- 首页
- 国家电网试题
答案:
-
1.(2)y' cos x=esim t
-
2.函数A、y = u n , u =cos x nB、y = t , t =cos n xC、y = t n , t =cos xD、y =cos t , t = x n
-
3.设 $f(x)$可导,求函数 $y=f(sin ^2 x) + f(cos^2 x) $的导数 $\frac{dy}{dx} $
-
4.int x,y,z; x=y=l; z(x , ty,y ); x=答案】2、3、2
-
5.求解 x, y 使得 x^2 + y^2 = p.设 p = 20190221 求解 x, y 使得 x^2 + y^2 = p.
-
6.函数y=cos(3-x)(e^x)的微分为
-
7.2x 2 (3xy 2 ﹣x 2 y)﹣2(xy 2 x 2 )
-
8.Assume that Z(t) = X(t) + Y(t), where X(t) and Y(t) are jointly stationaryrandom processes,then Sz(f)
-
9.y=tanx=sinx/cosx;y'=[(sinx)'cosx-sinx(cosx)']/cos^2x=(cos^2x+sin^2x)/cos^2x=()
-
10.rz x sn"rrAdr=-( cos x