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Math Help - Differentiate using Function of a Function (Chain Rule)

  1. #1
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    Differentiate using Function of a Function (Chain Rule)

    Differentiate using Function of a Function (Chain Rule)

    Is this correct?

    (x^9-8)^6

    u=x^9-2

    du/dx=9x^8

    y=u^6

    dy/du=6u^5

    dy/dx=dy/du . du/dx

    dy/dx = 6(x^9-2)^5 . 9x^8
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  2. #2
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    it is just:

    6*( ( x^9 - 8 )^5 )*( 9*x^8 )

    and not:

    6*( ( x^9 - 2 )^5 )*( 9*x^8 ) // probably mistake in writing
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  3. #3
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    haha yer gd point, thanks lol i beter make sure i can read and write for my exam on wednesday then
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