Question

If f(x) = 6ex cos(x), find f '(x) and f ''(x).

Answer 1

Explanation:

Substitute the value x=4 into f(x): f(4)=−6e4; f(4)≈−327.6.

Answer 2

f'(x) = 6e(cos(x))-xsin(x))

f''(x) = 6e(cos(x)-xsin(x)))

Explanation:

Search at symbolab derivative calculator and watch the steps there!

Since I'm not a tutor nor a teacher, it is very hard for me to show step-by-step, but I suggest you should view the (derivative) calculator.

GOOD LUCK!