SOLUTION: Find f ’(x) if f(x) = 5x^8 - 1x^4 + 9 and evaluate f ’(1).(Keep 2 decimal places)

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Question 1016417: Find f ’(x) if
f(x) = 5x^8 - 1x^4 + 9
and evaluate f ’(1).(Keep 2 decimal places)
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
For f(x) = 5x^8 - 1x^4 + 9 we use the power rules to find the derivative...
f'(x) = 40x^7 - 4x^3
f'(1) = 40 - 4 = 36