1003112005

SubArea: 
Derivative
Level: 
A
Project ID: 
1003112005
Accepted: 
1
Easy: 
1
Given the function f(x)=−x2−4x, determine all the values of x (x∈R) for which f′(x)=0.
x=−2
x=2
x=−4
x=4
x1=0, x2=4