Analyzing function behavior

2010012505

Level: 
A
Identify a true statement about the function f(x)=34x4+2x3.
The function f has a local maximum at x=2.
The function f has a local minimum at x=0.
The function f has two local extrema. These extrema are at x=0 and x=2.
The function f has neither local minimum nor local maximum.