设 (x)=sin x g(x)= -pi ,xleqslant 0-|||-+pi ,xgt 0-|||-则 [ g(x)] =() .-|||-A、sinx
1.y=sin2x的导数是 A A.2cosx B B.2sinx C C.2cos2x D D.cos2x一、单选题(共50题,100.0分) 23.
微分方程 cos x sin y (dy)/(dx) = sin x cos y 通解为() A)cos y = C cos x B)s
(x)=sin x,则(x)=sin x,______A 2 B 1 C (x)=sin x,D (x)=sin x,则______A2B1CD
(B.) y = (1)/(2)x^2e^2x + sin 2x. (C.) y = (x)/(2)(x + 4)e^3x. (D.) y = (x^2co
求函数y=√x-3sinx+log3x+cosπ/的导数A.y=√x-3sinx+log3x+cosπ/B.y=√x-3sinx+log3x+cosπ/C.y=
int cos xcdot cos (sin x)dx=sin (sin x)+C.A.对B.错.A.对B.错
(A.)f(x)+g(x)=o(g(x)) (B.)f(x)g(x)=o(f²(x)) (C.)f(x)=o(e^g(x)-1) (D.)f(x)=o(g²
A int cos xdx=sin x+CB int cos xdx=sin x+CC int cos xdx=sin x+CD int cos xdx=sin
f(x)=(cos )^23x,则f(3x)=(,,,,,)A、-3sin (6x)B、-3sin (18x)C、-9sin (18x)D、-9sin (6x)