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nincompoop

  • one year ago

use the definition of derivative to find f'(x)

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  1. nincompoop
    • one year ago
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    \[f(x)=\sqrt{(x-4)}\]

  2. myininaya
    • one year ago
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    Do you need help pluggin in or multiply by the the top's conjugate?

  3. swissgirl
    • one year ago
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    hmmm do you mean \[ \frac{f(a+h)-f(a)}{(a+h)-a}\]

  4. nincompoop
    • one year ago
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    that is the definition of derivative @swissgirl YES :D

  5. nincompoop
    • one year ago
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    so you're left with \[f'(x)=\frac{ \sqrt }{ h }\]

  6. swissgirl
    • one year ago
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    \[f'(x)=\frac{ \sqrt{(x+h)-4}-\sqrt{x-4}}{h}\]

  7. nincompoop
    • one year ago
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    \[f'(x)=\lim_{h \rightarrow 0}\frac{ \sqrt }{ ? }\]

  8. nincompoop
    • one year ago
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    WTFFFFFF

  9. shamil98
    • one year ago
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    LOL

  10. shamil98
    • one year ago
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    That latex fail

  11. nincompoop
    • one year ago
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    why is not going through?

  12. shamil98
    • one year ago
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    oh gratz on 90 ss nin

  13. swissgirl
    • one year ago
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    Just btw my definition is not complete. This is the correct definition \[ \lim_{h \to 0}\frac{f(a+h)-f(a)}{(a+h)-a}\]

  14. nincompoop
    • one year ago
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    \[f'(x)=\lim_{h \rightarrow 0} \frac{ \sqrt{(x+h)-4} -(\sqrt{x-4})} { h }\]

  15. nincompoop
    • one year ago
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    finally!!!!!!!!

  16. shamil98
    • one year ago
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    f(x) = (x-4)^1/2 \[f'(x)= (\frac{ x-4 }{ 2 })^{\frac{ -1 }{ 2 }}\]

  17. nincompoop
    • one year ago
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    I didn't want to pick on you, @swissgirl LAUGHING OUT LOUD but yes. without the limit would be the MVT or the mean value theorem

  18. shamil98
    • one year ago
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    o.o

  19. nincompoop
    • one year ago
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    no @shamil98 you've changed the entire thing by changing h = 2

  20. nincompoop
    • one year ago
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    h -> 0

  21. nincompoop
    • one year ago
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    you must be using a Plutonian Rule

  22. swissgirl
    • one year ago
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    Ok so basically the next step would be to multiply by the conjugate. Gonna write it out and scan it in cuz it will take me forever to type it in latex

  23. nincompoop
    • one year ago
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    I tried, omg that thing takes forever using the equation tool bar

  24. nincompoop
    • one year ago
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    you know at a glance, I thought it is not differentiable because it involves imaginary number and when that is the case, there's no limit with real number, hence no derivatives.

  25. swissgirl
    • one year ago
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    no there is a derivative just rewriting it.

  26. swissgirl
    • one year ago
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  27. nincompoop
    • one year ago
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    i know that >.<

  28. nincompoop
    • one year ago
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    was showing @shamil98

  29. nincompoop
    • one year ago
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    how'd you scan that so quickly?

  30. swissgirl
    • one year ago
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    ummm it takes no longer than a half a second to scan

  31. nincompoop
    • one year ago
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    omg my scanner takes like a light year to scan a page

  32. swissgirl
    • one year ago
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    I have an issue I cant draw straight lines -_-

  33. nincompoop
    • one year ago
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    ruler usually solves that problem

  34. swissgirl
    • one year ago
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    lol thats what I usually hafta us

  35. nincompoop
    • one year ago
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    it is less of a technology than a scanner

  36. swissgirl
    • one year ago
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    hahahaha

  37. nincompoop
    • one year ago
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    @shamil98 yo review this LAUGHING OUT LOUD so you can skip 2 years of college in math

  38. swissgirl
    • one year ago
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    Ya I am great at bargaining and I managed to still get warranty coverage after the warranty was over for a year and I complained that the scanning was slow so they sent me a newer model printer which works awesome

  39. nincompoop
    • one year ago
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    can you send me an extra scanner then? I want the fujitsu desktop scanner. the brother machine I have is uber slow

  40. swissgirl
    • one year ago
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    ohhh I kept it and gave it to my bros ato destroy

  41. nincompoop
    • one year ago
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    bought it for 99 bucks just to have something to scan all my lab and experiment draft crap

  42. swissgirl
    • one year ago
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    ummm I have hp

  43. swissgirl
    • one year ago
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    mine was $150 I think

  44. nincompoop
    • one year ago
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    yo I saw the HP one, it's "touch" technology, but it's bulky and it gets smudgie

  45. swissgirl
    • one year ago
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    But I gotta scan in all my work every week so it was a necessity

  46. swissgirl
    • one year ago
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    ya the touch aint bothersome But have not noticed it smudgy but then again I rarely print I usually scan

  47. nincompoop
    • one year ago
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    so do you think you can get the fujitsu desktop scanner? although it's not for high-paper scanning, it's fast and very small

  48. swissgirl
    • one year ago
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    for you or for me???

  49. swissgirl
    • one year ago
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    Not gonna waste my bargaining skills on you :P

  50. nincompoop
    • one year ago
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    you're mean ... just mean mean mean cheese

  51. swissgirl
    • one year ago
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    OMG its expensive -_-

  52. swissgirl
    • one year ago
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    Totally not on my budget

  53. nincompoop
    • one year ago
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    it's actually cheaper now. it used to be around 900

  54. swissgirl
    • one year ago
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    ya still dont excite me

  55. nincompoop
    • one year ago
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    I've been waiting for that crap to be like 200 bucks so I can buy it, but they kept discontinuing the older models

  56. swissgirl
    • one year ago
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    Smart guys

  57. nincompoop
    • one year ago
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    blame the canadians ....

  58. swissgirl
    • one year ago
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    Did ya hear ma mayor is a crack head :D

  59. nincompoop
    • one year ago
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    it's fujitfrichinsu, it should be Japan

  60. nincompoop
    • one year ago
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    your mayor? or the re-elected Christie of NJ?

  61. nincompoop
    • one year ago
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    wait he's a governor LAUGHING OUT LOUD

  62. swissgirl
    • one year ago
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    Hey I dont live in NJ remembah

  63. nincompoop
    • one year ago
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    I would have bashed him for being unhealthy fat slob and use that against him he neglects his own health and that is why he doesn't care about other people's health, which is the reason why he keeps cutting the university hospital's budgets

  64. swissgirl
    • one year ago
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    lol ohhh I forgot u live in NJ

  65. nincompoop
    • one year ago
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    I am a New Yorker... LAUGHING OUT LOUD

  66. swissgirl
    • one year ago
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    But u do live in NJ or at least at one point u did

  67. swissgirl
    • one year ago
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    idk I only have one place of residence

  68. nincompoop
    • one year ago
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    don't you live in like NJ, NY and Canada?

  69. swissgirl
    • one year ago
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    I visit those places but I only live in canada. I may be coming into NJ in 2 weeks -_-

  70. nincompoop
    • one year ago
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    laughing out loud

  71. swissgirl
    • one year ago
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    Its not funny!!! idk i may just stay at home alone. Seriously dont wanna head out there

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