(ds)^2=d(s^2)吗.d(x^2+y^2)=d(x^2)+d(y^2)吗.如果ds=dy,那么d(s^2)=d(
已知dx/dy=1/y′,求d(2)y/d x^2?
y=sin(x^2),求dy/d(x^3)
(d^2 y/d^2 x)/(dy/dx)= -(1/x)求特解
d/dx((x^2+y^2)^2)=d/dx(x^2-y^2),求(化简)dy/dx=?
从(dx)/(dy)=1/y '导出:(d^2x)/(dy^2)=-y''/(y')^3
已知dx/dy=1/y',求证1、d^2x/dy^2=-y''/(y')^3.2、d^3x/dy^3=[3(y'')^2
scanf("%2d%*2d%1d",&x,&y);是什么意思%2d%*2d%1d
已知DX=25,DY=36,ρ=0.4,求D(X+Y),D(X-Y),D(2X+3Y)
已知(dy/dx)=(1/y) ,求 (d^2y)/(d^2x)=?注意:不是求(d^2y)/(dx^2)
(X,Y)是二维随机变量,证明 D(X±Y)=D(X)+D(Y)±2Cov(X,Y)
试从dx/dy=1/y'导出:d^2x/dy^2=-y''/(y')^3.d^2x/dy^
试从dx/dy=1/y'导出:d^2x/dy^2=-y''/(y')^3 题目中关于d[1/y']/dx}*[dx/dy