Answer to Question #149969 in Calculus for enny

Question

f(x)=2x^4+x^3-3x+2, then f ''(x)=
a)31
b)21
c)20
d)30

Answer 1

$$f'(x)=8x^3+3x^2-3$$

$$f''(x)=24x^2+6x$$

$f''(1)=24(1)^2+6(1)=30$

d)30