Find the derivative.f(x) = 5x4 - 6x3 - 5, find f'(x)

A. 20x3 - 18x2 - 7
B. 4x3 + 3x2
C. 20x3 - 18x2 
D. 4x3 + 3x2 - 7

Answer: C

Mathematics

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