A.3
B.-3
C.-6
D.6
[单选题]A.B.C.D.
[单选题]A.1/5B.2/9C.10/11D.12/13E.15/16
[单选题]A.0B.9πC.3πD.
[单选题]A.1B.C.2D.
[单选题]A.F(0)是极大值B.F(0)是极小值C.F(0)不是极值,但(0,F(0))是曲线F(x)的拐点坐标D.F(0)不是极值,(0,F(0))也不是曲