应该是对x求偏导,即fx(x,y)=d[f(x,y)]/dx=y*cos(xy)
设f(x,y)=sin(xy),则fx(x,y)=?
2个回答
相关问题
-
f(x,y)=sin(xy),求fx(x,y)=?
-
设f(xy,x-y)=x²+y²,则f(x,y)=?
-
设f(x,y)=xy+x/y,则f(x+y,1)=( )
-
设f(x+y,x-y)=xy,z=(xy,x/y),则dz=
-
设f(x,y)=xe^y+xy,则f(x+y,x-y)=
-
设f(x+y,xy)=x^2+y^2,则f(x,y)
-
设f(x,y)=x^3*y-y^3*x,则fx(0,1)=?
-
设f(xy,y/x)=x的平方-y的平方,则f(x,y)=
-
设函数y=f(x)由方程sin(xy)=x+y确定,求y’和dy.
-
题:设f(x+y,x-y)=xy+y^2,则f(x,y)=______(那是y的平方)