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bmelyk

Just want an answer checked: Find the derivative of the function given below. y = (3x4 – 3x + 5)^-3

  • one year ago
  • one year ago

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  1. bmelyk
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    \[-3 x (\frac{ 4x^3-3 }{ (3x^4-3x+5)^-4 }\]

    • one year ago
  2. bmelyk
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    that's not a -3x, it's -3 times the fraction.

    • one year ago
  3. hartnn
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    why is there 3x multiplied ?

    • one year ago
  4. hartnn
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    then you are correct!

    • one year ago
  5. bmelyk
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    yay~~~ :)

    • one year ago
  6. uzumakhi
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    there should be 12 x^3 in place of 4x^3

    • one year ago
  7. bmelyk
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    why?

    • one year ago
  8. bmelyk
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    it should be 12x^2 shouldnt it?

    • one year ago
  9. uzumakhi
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    can you write correct answer for us

    • one year ago
  10. bmelyk
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    12x^3, i see why.

    • one year ago
  11. hartnn
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    -3*(4x-3) will give -12x^3 +9 @uzumakhi

    • one year ago
  12. bmelyk
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    i didn't do out the derivative, i get it.

    • one year ago
  13. bmelyk
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    so i was right to begin with?

    • one year ago
  14. bmelyk
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    now im confused.. was my answer okay in the first place?

    • one year ago
  15. uzumakhi
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    \[-3(\frac{ 12x ^{3}-3 }{ (3x ^{4}-3x + 5)^{4} })\]

    • one year ago
  16. uzumakhi
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    recheck your answer with my answer then you find your mistakes

    • one year ago
  17. hartnn
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    oh , yes.....sorry! u missed the 3 @uzumakhi is correct. sorry for confusion :(

    • one year ago
  18. bmelyk
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    no i have the same now because when you take the derivative of 3x^4-3x+5 it is 12x^3-3, i forgot to place my power rule on my 3x^4

    • one year ago
  19. uzumakhi
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    that i want to tell in begining

    • one year ago
  20. bmelyk
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    i gotcha!

    • one year ago
  21. uzumakhi
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    ok your wlcome

    • one year ago
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