A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

what am i doing wrong here ? Let "picture" Use your calculator to find F″(1)

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    1 Attachment
  2. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    im getting 2

  3. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    but these are my only answer choices 12 6 4 1/9

  4. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    F'(x) = ln(9x^2) F"(x) = 2/x F"(1) = 2 what am i doing wrong?

  5. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @abb0t @freckles @UsukiDoll

  6. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    ~_O uhhhhh.. integration is always anti-derivatives no matter what... something is off.

  7. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    do you hink the answer choices are somehow wrong?

  8. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    ah... try taking the anti-derivative.... then f(b)-f(a) which is f(3x)- f(1) and then evaluate when x = 1?!?!?!!?!?!!!!!!!!!!!!!!!!!!!!!!!!!! this is one strange question

  9. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    because whenever I see the integral sign... it's always antiderivative.

  10. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    @ganeshie8 any ideas? O_o

  11. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    hey @Astrophysics while i have you here can you give me the link to the cool openstudy extension i managed to lose the question where you provided the links :/

  12. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Hey sorry I was away, yeah sure just send me a message of what exactly you want. since F'(x) = f(x) we have\[F'(x) = \int\limits_{1}^{3x} \ln(t^2) dt\] \[F'(x) = \ln(9x^2) - \ln(1)\] F''(x) = f'(x) \[F''(x) = \frac{ 2 }{ x }\] \[F''(1) = 2\] so this is what you did?

  13. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes

  14. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Mhm that seems right to me haha.

  15. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so somehow the answer choices and whatever you guys did don't match... :/ ~_O! either wrong problem screenshot or wrong answer choices?!!!!!

  16. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    \[\frac{ d }{ dx } \int\limits_{1}^{3x} \ln(t^2) dt = \ln(3x)\] see it basically just cancels out the integral you get what you initially started with, but I don't really trust this integral itself...

  17. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I got the solution.. *grabs problems and throws it away*

  18. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    I think there is a reason it asks us to use a calculator :P

  19. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    the ln(1) = 0

  20. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah I was thinking that but it truly no longer matters i submitted the answer as 4 and got it wrong , no worries though ill just ask my professor how to do it and see what happens.

  21. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    uh huh ln 1 is 0... the way the question is written is odd...too strange for me :P

  22. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    fundamental theorem of calculus? eh forget it........ <_<

  23. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Ah wait let me see...F'(x) = f(x) \[F'(x) = \int\limits_{0}^{3x} \ln(t^2) dt = \ln(9x^2)-\ln(1) \] \[F'(x) = \ln(9x^2) \times (3x)' = 3\ln(9x^2) \] I found the mistake...we're suppose to take the derivative of 3x as well..totally missed that part...ok so we have now F''(x) = f'(x) \[F''(x) = \frac{ 6 }{ x } \implies f''(1)= 6\]

  24. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    F''(1) = 6*

  25. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Fundamental theorem of calculus..bleh

  26. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    AAARRRRGGGGHHHH

  27. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    wait wtf so when I said Fundamental theorem of Calculus, we got wtf we need?

  28. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Yeah haha...can you submit your answer again, does it show the right one?

  29. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    da phuc?

  30. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    haha

  31. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no -_- but it is clearly 6

  32. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    damn it all to hell D:

  33. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    ffffffffffuuuuuuxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

  34. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ugh oh well , got a B either way

  35. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    I apologize for the late reply, sorry @Jdosio :\

  36. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    its okay, thats what i get when i don't wait for you :(

  37. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    ah I see how FTC part 1 would work... but damn too late...

  38. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Yeah haha, I just remembered part 1, it's so silly

  39. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    then product rule twice... -_- CURSESSSSSSSSSSSSSSSSSSSSSS

  40. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thanks for sticking around so long either way :)

  41. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    the variable on f(b) I remember using FTC part 1 all the time on that one... you have to substitute it into the equation (that ln t^2) and then take the derivative of 3x as well

  42. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Yup

  43. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    You have to use the chain rule pretty much...it's weird.

  44. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    phuc.. it was my slow thinking -_-

  45. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Maybe you can get your mark back, just show the work I guess

  46. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    To your professor

  47. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    its fine its just one question,

  48. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Well you won't forget next time either, as I like to say...the struggle is more important than the final answer :)

  49. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1438769488029:dw| |dw:1438769540072:dw||dw:1438769592473:dw|

  50. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    *shoots question*

  51. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Haha

  52. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    the problem is that FTC 1 is rarely mentioned so there's not a whole lot of practice problems.

  53. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    everyone uses f(b)-f(a) part 2

  54. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    I don't think I've used it since calc 1...I only used it once maybe?

  55. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    part 2 <3

  56. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    ftc 1 is in calc i and only in calc i where as ftc 2 is in calc ii and again in calc iv

  57. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    what are you taking now @Astrophysics

  58. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    I'm going to take ODE :)

  59. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    ODEs are fun...

  60. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    I've taken all the calc courses already, vector calc was ew >.<

  61. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    But also fun sometimes haha

  62. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Towards the end is where I got lost, as we did not have enough time...like I still don't understand Stoke's theorem very well, but don't worry about that stuff right now haha.

  63. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I'm taking Discrete Math this semester to improve my proof writing techniques.

  64. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Yeah, that would be a good idea

  65. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    gawd I hate proofs... if they are hard >:(

  66. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i really want to take tensor calc, theirs so much of general relativity that is jiberish without it :/

  67. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    I think it also involves graph theory, from what I've heard is super easy

  68. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Yeah haha, I'm actually just taking the math courses that will benefit me in physics right now, al though I would love to take as many math courses I like xD, I'll probably end up doing a lot of them myself after I graduate..

  69. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    already got 22 credits worth of upper division math XD.

  70. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    which exceeds the BA requirements... BS I think is 39 credits

  71. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    How many credits per course?

  72. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Here it's 3

  73. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    3 credits usually, but one of them was 4

  74. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ugh all of that sounds so cool!!! i cant wait to get out of high school -_-

  75. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Ahh you're doing this in high school?! I was a total idiot during high school, actually I still am xD

  76. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    but be prepared for those dumb general ed requirements. nugh

  77. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I'm doing better in university since I'm taking nothing but maths XD ... and some other requirements that aren't too bad

  78. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Lol I hate the core courses, made me take 2 english courses >:( haha.

  79. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yeah I'm like literary analysis isn't going to get you a job mannnnnnnnn!!!!!!!!!

  80. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Well at least I learnt how to write a research paper, so that's good I suppppppose.

  81. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i just want to do some bloody physics !! but nothing makes sense without calc 1 and 2 .... so here i am

  82. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Lol the physics that requires calculus is annoying at times but very beautiful...

  83. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    ehhhhhhhh freelance and technical writing is different XD!!!!! Business writing is useful though

  84. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    It can be very tedious

  85. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Well good luck Jdosio :D, physics and math is awesome, so keep on learning!

  86. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I always die in science subjects T_T. math problems... ok... science problems...OMG GET ME OUT OF HERE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  87. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Calculus is cool because you can derive a lot of the formulas from it, as in kinetmatics but I could show you how to derive those using just a position time graph as well.

  88. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yep, got to admit it can get quite mundane at times but i love it ! :D

  89. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    what do you plan on doing after you graduate?

  90. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    More studying!!! WOO..haha I haven't thought that far as you can see.

  91. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    try and get in the MA ...... nothing but pure math ughhhhhh. but an MA in Math is needed to teach at colleges.

  92. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Hey, do what ever you like/ enjoy!

  93. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    BA in Math is just teaching in High School but at least I'm overqualified for elementary/middle lol... my alma mater wants me to come back.. um no.

  94. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    lol XD

  95. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Haha, I think I could probably teach a few high school courses as well...chemistry...physics...math maybe

  96. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Maybe some biology, been a long while since I've done it though xD

  97. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I wanna go back to the same high school I graduated in. XD. there's air conditioning in that building.

  98. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    but I'm trying to aim for teaching at community college/university though.... better benefits.. I think

  99. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    For sure!

  100. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i feel like teaching is losing though.... im not sure why i mean objectively it sounds great but i just cant see myself ever teaching and enjoying it.

  101. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Passing the torch I see, Usuki the great :)))

  102. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    teaching is frustrating and not easy... I have to admit it. no wonder some professors get irritated.

  103. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Haha, yeah it can be, but still better than a lot of other jobs, but idk I rather just learn right now and not worry about it xD, go with the flow!

  104. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yep, okay well i'm heading to bed , see you guys around :D

  105. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yeah...beats minimum wage X-X

  106. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Take care :)

  107. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    k night :)

  108. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.