Given f(x) = csc^4(5x^2-3x+1), find f'(x). Show all work.

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asked by Bob
  1. If u = 5x^2-3x+1,

    f(u) = csc^4(u)
    f'(x) = f'(u)*u' = 4 csc^3(u) (-csc(u)cot(u)) u'
    u' = 10x-3

    Now just do the substitution.

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    posted by Steve

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