Question

If f(x)=[(6x^3)-3]/x^4

a)find f' (x)

b) find f'(4)

Answer 1

use the quotient rule

f ' (x) = ( x^4(18x^2) - 4x^3(6x^3 - 3) )/x^8

simplify if needed, then evaluate
f ' (4)