北师大版选修1-1 3.3计算导数练习卷
下列运算正确的是( )
A.(ax2﹣bx+c)′=a(x2)′+b(﹣x)′ |
B.(sinx﹣2x2)′=(sinx)′﹣(2)′(x2)′ |
C.(cosxsinx)′=(sinx)′cosx+(cosx)′cosx |
D.[(3+x2)(2﹣x3)]′=2x(2﹣x3)+3x2(3+x2) |
y=sinx(cosx+1)的导数是( )
A.cos2x﹣cosx | B.cos2x+cosx |
C.cos2x+sinx | D.cos2x+cosx |