求y=√[(x-1)(x-2)]/[(x-3)(x-4)]的导数

y=arcsin(x/√1+x^2),求y' y=ln(x+√x^2+1),求y 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 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 x+2y=2x+y+1=7x-y 求：2x-y? (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) 若x*x+y*y=x+y-1/2,求x,y的值如题 x+y=1,xy=-1/2,求x(x+y)(x-y)-x(x+y)2 y=(2x*x-2x+3)/(x*x-x+1),求值域? 求值域 y=(x²-1)/(x²+x+1); y=2x-3+√(13-4x); y=(3x+2)/(x-1) 求值域 y=(x²-2)/(x²+x+1); y=2x-3+√(13-4x); y=(3x+2)/(x-1) 求值域 1,y=(x+2)/(x*x+3x+6) 2,y=3x/(x*x+4) {(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=? y=x√(1+x^2)+ln(x+√(1+x^2) 求dy y=x+√(x^2+1),求反函数.是log2[x+√(x^2+1)]！ y=√x+2/[(√2x-1)-x],求自变量x的范围 求导数y=xln(x+√1+x^2)-√1+x^2y=xln(x+√1+x^2)-√1+x^2 求y' 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