求y=x(x*x+1/x+1/x*x*x)的导数 答案是3x^2-2/x^3

求函数的导数y=(x/1+x)^x+x^(x/1+x) y=(2x*x-2x+3)/(x*x-x+1),求值域? y=x^x的导函数是：y'=x^x(Inx+1)我知道怎样求.但为什么不可以这样求.y=x^x=x*x*x*x*x*x*...*x(x个x) 则y'=(x')*x^(x-1)+x*(x')*x^(x-2)+.=x^x 用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+. y=X+1/x(x>O)求y最小值 求值域 1,y=(x+2)/(x*x+3x+6) 2,y=3x/(x*x+4) 求导 y=[x/(1+x)]^x 已知x+y=a,2x-y=-2a,求[（x/y-y/x)/(x+y)-x(1/x-1/y)]/[(x+1)/y]的值 x.y都是自然数,且x(x-u)-y(y-x)+12,求x.y得值快1且x(x-y)-y(y-x)=12 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 求y=1/1-x(x Y=X(X-1),求导数 求值域 y=x/x+1 x+y=1,xy=-1/2,求x(x+y)(x-y)-x(x+y)2 已知x+y=1,xy=-二分之一,求x（x+y)(x-y)-x(x+y)² 已知x+y=1,xy=-二分之一,求x（x+y)(x-y)-x(x+y)² x>=1,x-y y=x-1(x