SubArea: Analyzing function behaviorLevel: AProject ID: 9000079105Source Problem: 2010001701Accepted: 1Clonable: 1Easy: 0Find all the x at which the function f has local extrema. f(x)=(1−x2)3x=0x1=0, x2=1x1=−1, x2=1x1=−1, x2=0, x3=1