Level:
Project ID:
1003230202
Accepted:
1
Given the function \( f(x)=\frac x{4-x^2} \), find the set of all \( x \), \( x\in\mathbb{R} \), for which \( f'(x)=0 \).
\( \emptyset \)
\( \{ 2 \} \)
\( \{ -2;2 \} \)
\( \{ -2 \} \)
\( \{ 0 \} \)
\( \{ 4 \} \)