A.-15                  B.-3                     C.1                      D.5

A.y′=log_ae                              B.y′=-log_ae

C.y′=-log_ae                             D.y′=log_ae

A.x-                 B.--                  C.-                   D.x

A.            B.cot2x            C.2cot2x            D.

已知0＜x＜1,求y=x的导数.

(1)y=ln(sin²x+x³+3);

(2)y=log_a(+);

(3)y=x²ln(x+1);

(4)y=(3x-1)log₂(5x+6);

(5)y=ln.