化简：1/2x-1/(x+y).[x2-y2+(x+y)/2x

化简：1/2x-1/(x+y).[x2-y2+(x+y)/2x y=x+√(1-x2) y2=x2+(1-x2)+2x√(1-x2) 1.x2+(1+x)2+(x+x2)22.(x+y)4+(x2-y2)2+(x-y)4 化简x/x2+x除以x2+x-2/x2-1+x+1/x+2 1.(x-y)(x2+xy+y2) 2.求值x2(x-1)-x(x2+x-1),其中x=2分之一 y=x2-2x+1(-1 y=x2-2x+5(-1 y=x2-2x(-1 y=(x2-2x+1)/( x2+1)的值域 因式分解 x2(x+1)-y(xy+x) 函数y=x2+1/x(x 化简x-1分之x+1-x2-1分之x2-2x÷x2-x-2/x2+2x+1 化简x2＋2x＋1分之x2－y2÷x＋1分之x－y 求y=(x2+x+1)/(x2+2x+1)(x>0)的最小值 y =2-2x+x2/1-x的值域X2是x的平方 y=(x-1/X)(X2-1/X2)的导数, 问几个分式化简的问题：a2-ab/b2-ab x2+x/x2-1 x2+4x/x2+8x+16 x2-2x/2y-xy 函数y=(x2-x)/(x2-x+1)的值域