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anonymous

  • 5 years ago

hello, Amistre64?

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  1. amistre64
    • 5 years ago
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    hi :)

  2. anonymous
    • 5 years ago
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    o.O

  3. anonymous
    • 5 years ago
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    Hey, you are still here! And it's me with these blasted exponents again! What are the rules for negative exponents?

  4. anonymous
    • 5 years ago
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    Like 2^-3/4, what is that answer?

  5. anonymous
    • 5 years ago
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    How do you write it out to figure the answer no matter what the exponents are?

  6. anonymous
    • 5 years ago
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    \[a^{-b}=\frac{1}{a^{b}} \]

  7. anonymous
    • 5 years ago
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    ok, so 2^-3/4 is 1/2^3/4? What is the value of that then?

  8. amistre64
    • 5 years ago
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    \[2^{-3/4} \iff \frac{1}{2^{3/4}}\]

  9. anonymous
    • 5 years ago
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    you can split up the fraction. (2^3)^(1/4)=8^(1/4) 1/(8^(1/4))

  10. anonymous
    • 5 years ago
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    ok, so are the answers ever negative when you have a negative exponent? It looks to me like they are always positive!

  11. anonymous
    • 5 years ago
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    sure -2^-3=-1/8

  12. anonymous
    • 5 years ago
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    but thaqt is where the base number is negative. what about the exponent being negative?

  13. amistre64
    • 5 years ago
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    programs dont like to see a ^-exp

  14. amistre64
    • 5 years ago
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    a negative exponents is a symbol for inverse; and the inverse of a rational number is just flipping it over

  15. anonymous
    • 5 years ago
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    i am very very confused. How can -2^-3 be -1/8

  16. anonymous
    • 5 years ago
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    (-2)^-3=1/(-2)^3=1/-8=-1/8

  17. anonymous
    • 5 years ago
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    Ah! I see! Ok...this is so confusing I am scared

  18. amistre64
    • 5 years ago
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    \[-2^{-x} \iff \frac{-1}{2^x}\] \[{-1\over 2^3} = {-1\over8}\]

  19. anonymous
    • 5 years ago
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    its not so bad after you've practiced enough just keep doing problems

  20. anonymous
    • 5 years ago
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    so does 1/1^1/2 equal 1?

  21. anonymous
    • 5 years ago
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    sqrt(1)=1 yep

  22. amistre64
    • 5 years ago
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    \[1^{anything}=1\]

  23. anonymous
    • 5 years ago
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    anything^0=1

  24. anonymous
    • 5 years ago
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    ok, but what if it is 1/3^1/2? What the answer then?

  25. anonymous
    • 5 years ago
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    0^0=1 is debatable though I think

  26. amistre64
    • 5 years ago
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    \[\sqrt{1/3}\]

  27. amistre64
    • 5 years ago
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    \[{1\over\sqrt{3}} \iff {\sqrt{3}\over3}\]

  28. anonymous
    • 5 years ago
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    wait a minute, Amistre64, why is that sqrt of 1/3? Isn't it just 1/sqrt3?

  29. anonymous
    • 5 years ago
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    same thing, sqrt(1)=1

  30. amistre64
    • 5 years ago
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    \[\sqrt{{1\over3}}\iff {\sqrt{1}\over\sqrt{3}}\iff \frac{1}{\sqrt{3}}\iff \frac{\sqrt{3}}{3}\]

  31. anonymous
    • 5 years ago
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    My problem in particular is the following: -1-2(1)^1/2. That's what I cannot figure out.

  32. amistre64
    • 5 years ago
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    that looks to be -3

  33. anonymous
    • 5 years ago
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    Wait TYPO!!! sorry! Do Not Reply to that. It's -1-2(1)^-1/2

  34. amistre64
    • 5 years ago
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    \[-1-2(1^{1/2})\]

  35. amistre64
    • 5 years ago
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    \[-1-2(1^{-1/2})\]

  36. amistre64
    • 5 years ago
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    \[-1-2(1^{-1/2}) \rightarrow 1^{anything}=1\] \[-1-2(1) \iff -1-2=-3\]

  37. anonymous
    • 5 years ago
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    ok, but what if that said -1-2(3)^-1/2

  38. anonymous
    • 5 years ago
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    What does 3^-1/2 equal

  39. anonymous
    • 5 years ago
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    oh wait! That =1/sqrt3, right?

  40. amistre64
    • 5 years ago
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    yes

  41. amistre64
    • 5 years ago
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    tell me; what does an exponent mean?

  42. anonymous
    • 5 years ago
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    ok, so then what if it is 3^-3/4? Would that be 1/4throot of 27?

  43. anonymous
    • 5 years ago
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    I do not know how to define an exponent. Sorry.

  44. amistre64
    • 5 years ago
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    it is simply a way to write large numbers; it tells us how many times we multiply to get the number it represents

  45. amistre64
    • 5 years ago
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    do you know what multiplication is?

  46. anonymous
    • 5 years ago
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    That i know!

  47. amistre64
    • 5 years ago
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    multiplication is a way of writing large numbers; and it tells us how many times we add the number to itslef

  48. amistre64
    • 5 years ago
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    2+2+2+2+2+2 = ? = 6(2) right?

  49. anonymous
    • 5 years ago
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    yes

  50. amistre64
    • 5 years ago
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    2.2.2.2.2.2 = ? = 2^6

  51. amistre64
    • 5 years ago
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    that is all an exponent amounts to

  52. amistre64
    • 5 years ago
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    tell me: if a positive exponent means to multiply; what does a negative exponent tell us?

  53. anonymous
    • 5 years ago
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    you know that problem up there, the one I said I needed to figure out? They are saying that the answer to - -2(1)^-1/2 is=-1 not -3.

  54. amistre64
    • 5 years ago
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    then you prolly mis notated it

  55. amistre64
    • 5 years ago
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    or the program could be in error :)

  56. anonymous
    • 5 years ago
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    Sorry typo again. It's -1-2(1)^-1/2 Let me try to use the equation thing.

  57. amistre64
    • 5 years ago
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    a negative exponent indicates division; since its the opposite of multiplication right?

  58. anonymous
    • 5 years ago
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    \[-1-2(1)^{-1/2}\]

  59. amistre64
    • 5 years ago
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    2^-3 means: ((1/2)/2)/2 = 1/8

  60. amistre64
    • 5 years ago
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    \[-1-2(1)^{-1/2} = -1-2(1) = -1-2 = -3\]

  61. anonymous
    • 5 years ago
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    ok! This is sooooo hard. I just can't get a grasp on it. I;m sorry. I'm so frustrated I could cry! I have been wroking on this single problem for 6 hours and I cannot get it right.

  62. amistre64
    • 5 years ago
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    you know what we do when that happens? we say 'next' and move on lol

  63. amistre64
    • 5 years ago
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    one answer to one math problem aint gonna end the world dear :)

  64. anonymous
    • 5 years ago
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    But all these problems have these exponents in them and I cannot get any of them right!

  65. amistre64
    • 5 years ago
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    are they in a book? or on the computer?

  66. anonymous
    • 5 years ago
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    I mean ALL of them have exponents! And that's alot of wrong answers, not just one!

  67. anonymous
    • 5 years ago
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    They are on my MathXL program for my class

  68. amistre64
    • 5 years ago
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    do you know how to get a screen shot?

  69. anonymous
    • 5 years ago
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    No, I dont' even know what that is.

  70. amistre64
    • 5 years ago
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    look near your keys on the keyboard that you never use; pause, break, scroll lock.... and tell me if you see a 'PrtScrn' key

  71. anonymous
    • 5 years ago
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    yes I do. What does it do?

  72. amistre64
    • 5 years ago
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    its the 'print screen' key; it takes a picture of whatever is on your screen

  73. anonymous
    • 5 years ago
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    ok, so then what do I do with it?

  74. amistre64
    • 5 years ago
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    do you have a paint program on your computer? you on windows?

  75. anonymous
    • 5 years ago
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    I am on windows 7, but I don't know how to use paint or anything like that. Not only do I suck at math I suck at computers and most things!

  76. amistre64
    • 5 years ago
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    click: START -> PROGRAMS -> ACCESSORIES -> PAINT

  77. anonymous
    • 5 years ago
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    ok, then what do I do when I open paint?

  78. amistre64
    • 5 years ago
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    you tell me that youve opened it lol

  79. anonymous
    • 5 years ago
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    oh you are a funny one!

  80. amistre64
    • 5 years ago
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    you ever copy and paste anything in a text document?

  81. anonymous
    • 5 years ago
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    I opened it but it took up so much of the screen I cannot see this one. I have copied and pasted. How do I do that aFTE I take a creen shot of the screen?

  82. anonymous
    • 5 years ago
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    That wierd word is after

  83. amistre64
    • 5 years ago
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    in paint, just rightclick the mouse and pick 'paste' or hold down your 'ctrl' key and press the 'v' key

  84. anonymous
    • 5 years ago
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    when i click screen shot, where si the picture of the screen saved?

  85. anonymous
    • 5 years ago
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    THAT weird word is "is" not si.

  86. amistre64
    • 5 years ago
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    its saved in memory; the steps are: 1; press the 'prtscrn' key 2; open paint 3; hold down the 'ctrl' key and press the 'v' key

  87. anonymous
    • 5 years ago
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    ok let me try that. If I blow up my computer...; )

  88. amistre64
    • 5 years ago
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    ...... blame the kid lol

  89. anonymous
    • 5 years ago
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    i never thought I'd be laughing over this calculus today...thanks! Let me try that!

  90. anonymous
    • 5 years ago
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    ok, I have it on the paint screen, now what do I do with it?

  91. amistre64
    • 5 years ago
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    click: File. click: Save in the box that opens press 'desktop' to save it on your desktop then you can attach it to the post inhere with the 'attach file' button at the bottom of the screen

  92. anonymous
    • 5 years ago
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    ok, but you are sure asking alot of a dummy, buddy. ; )

  93. amistre64
    • 5 years ago
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    :) baby steps

  94. anonymous
    • 5 years ago
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    1 Attachment
  95. anonymous
    • 5 years ago
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    Hey, I just got an achievement award for that! I like this place!

  96. amistre64
    • 5 years ago
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    lol..you did it yay!!

  97. amistre64
    • 5 years ago
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    is this the problem your working on?

  98. anonymous
    • 5 years ago
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    That is the problem with the answer for the whole mess in that box.

  99. amistre64
    • 5 years ago
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    why dont i just step you thru this problem instead of trying to guess what you need lol

  100. anonymous
    • 5 years ago
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    ok, if you don't mind!

  101. amistre64
    • 5 years ago
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    you aint doin a derivative of nuthin; your integrating ...

  102. anonymous
    • 5 years ago
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    what does integrating mean, anyway?

  103. amistre64
    • 5 years ago
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    first step is to make life easier by turning it into a sum of parts...like this: \[\frac{s^2+\sqrt{s}}{s^2}\iff \frac{s^2}{s^2}+ \frac{s^{1/2}}{s^2}\]

  104. amistre64
    • 5 years ago
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    \[1 + s^{1/2 - 2} \iff 1+s^{-3/2}\]

  105. amistre64
    • 5 years ago
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    it means to undo a derivative for now

  106. amistre64
    • 5 years ago
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    \[\int_{} 1+s^{-3/2}ds\] is the problem

  107. amistre64
    • 5 years ago
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    which becomes the intergral of sums like this: \[\int_{}1ds+\int_{}s^{-3/2}ds\]

  108. amistre64
    • 5 years ago
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    \[\int_{}1ds \implies s\] \[\int_{}s^{-3/2}ds \implies \frac{s^{-(3/2)+1}}{-(3/2)+1}\]

  109. amistre64
    • 5 years ago
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    \[s + \frac{s^{-1/2}}{-1/2} \implies s-2s^{-1/2} from|1,\sqrt{11}|\]

  110. amistre64
    • 5 years ago
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    \[\sqrt{11}-2(\sqrt{11})^{-1/2} - (1-2(1)^{-1/2})\]

  111. amistre64
    • 5 years ago
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    \[\sqrt{11}-\frac{2}{\sqrt{\sqrt{11}}} -1 +2\] \[\sqrt{11}-\frac{2}{\sqrt[4]{11}}+1\]

  112. amistre64
    • 5 years ago
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    does this look better yet?

  113. amistre64
    • 5 years ago
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    is the answer in the box what they say is correct?

  114. anonymous
    • 5 years ago
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    the answer in the box is the one they say is correct, yes.

  115. amistre64
    • 5 years ago
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    then i guess i can stop at that lol

  116. anonymous
    • 5 years ago
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    so in other words, you know exactly what you are doing!!!

  117. amistre64
    • 5 years ago
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    ive been known to yes :)

  118. anonymous
    • 5 years ago
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    oh boy. I really need to work that. It's the end with the -1 or 3 that I keep getting confused. I knew that answer would be either one but the exponent throws me off and I don't know if it's a positive one or a negative one.

  119. amistre64
    • 5 years ago
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    post another question; cause i think this ones getting wacky with all the replies; and attachthe next file for the next question and lets see if we can work thru it

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