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klllerbee

  • 2 years ago

what is the derivative of 7arcsin(10x^2+15x-9)

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  1. primeralph
    • 2 years ago
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    differentiate the stuff inside the arcsin, then multiply that by 7/sqrt(1-(stuff inside arcsin)^2)

  2. RolyPoly
    • 2 years ago
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    Let \[y=7sin^{-1}(10x^2+15x-9)\] \[\frac{y}{7}=sin^{-1}(10x^2+15x-9)\]\[sin(\frac{y}{7})=(10x^2+15x-9)\]Differentiate both sides with respect to x.

  3. klllerbee
    • 2 years ago
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    @_@ i don't see any of those answers as a choice.

  4. zepdrix
    • 2 years ago
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    lol he didn't give you the answer, he was giving you a way to solve the problem -_-

  5. zepdrix
    • 2 years ago
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    To start, do you know this derivative?\[\large y=\arcsin x \qquad \qquad y'=?\]

  6. klllerbee
    • 2 years ago
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    differentiate the stuff inside the arcsin, then multiply that by 7/sqrt(1-(stuff inside arcsin)^2) i did this

  7. klllerbee
    • 2 years ago
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    i know it's something like 1/sqrt(1-u)^2

  8. primeralph
    • 2 years ago
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    |dw:1368923334862:dw|

  9. primeralph
    • 2 years ago
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    that's what I was saying

  10. zepdrix
    • 2 years ago
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    Yes that sounds right bee, \[\large y=\arcsin x \qquad \qquad y'=\frac{1}{\sqrt{1-x^2}}\]

  11. klllerbee
    • 2 years ago
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  12. klllerbee
    • 2 years ago
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    I did the thing he told me and none of those answers matched @_@

  13. primeralph
    • 2 years ago
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    @klllerbee look at my first post...............

  14. klllerbee
    • 2 years ago
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    I looked at your post, 7/sqrt(1-(stuff inside arcsin)^2) But the only one I see is 7/1+(10x^2+15x-9)^2 since it's a plus there i know i'm doing something wrong

  15. primeralph
    • 2 years ago
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    I said sqrt.....meaning square root

  16. primeralph
    • 2 years ago
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    sqrt(1-(stuff inside arcsin)^2)

  17. klllerbee
    • 2 years ago
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    \[7/\sqrt(1-(10x^2+15x-9))^2\]

  18. klllerbee
    • 2 years ago
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    ok, cool. Thanks guys

  19. klllerbee
    • 2 years ago
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    How do i give you metals for helping :D i'm new here

  20. primeralph
    • 2 years ago
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    no, that's not the final answer.......

  21. primeralph
    • 2 years ago
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    still got to multiply it by the derivative

  22. klllerbee
    • 2 years ago
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    oh so the final answer is 7x(20x+15)/sqrt(1-(10x^2+15x-9)^2

  23. primeralph
    • 2 years ago
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    yeah.....ze medal?

  24. klllerbee
    • 2 years ago
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    where is the metal button?

  25. klllerbee
    • 2 years ago
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    :( i don't know what i'm doing with this software

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