If f(x) = 2 x - 3x^4 + 8, then f ¢(x) is: - Vidyadip

MCQ

If $f(x) = 2\sin x - 3x^4 + 8$, then $f ¢(x)$ is:

A
$2\sin x - 12x^3$
✓
$2\cos x - 12x^3$
C
$2\cos x + 12x^3$
D
$2\sin x + 12x^3$

✓

Answer

Correct option: B.

$2\cos x - 12x^3$

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