A.对任意x,f′(x)>0
B.对任意x,f′(x)≤0
C.f(-x)单调增加
D.-f(-x)单调增加
[单选题]A.B.C.D.
[单选题]A.1B.2C.4D.1/4
[单选题]A.间断点B.连续而不可导的点C.可导的点,且f′(0)=0,D.可导的点,且f′(0)≠0
[单选题]A.4πB.3/4πC.2πD.4π/3
[单选题]A.-2xdxB.C.D.