Question
Question: In (–4, 4) the function f(x) = <img src="https://cdn.pureessence.tech/canvas_24.png?top_left_x=0&top...
In (–4, 4) the function f(x) = 
e–4t dt has –
A
No extrema
B
One extremum
C
Two exterma
D
) Four exterma
Answer
Two exterma
Explanation
Solution
f'(x) = (x4 – 4)e– 4x .1 = e–4x [(x2 + 2)(x2–2)]
= 
f(x) has two point of extremum