计算:1.y/4x²-1/12y²+1/6xy 2.3/x-6/1-x-x+5/x²-x

问题描述:

计算:1.y/4x²-1/12y²+1/6xy 2.3/x-6/1-x-x+5/x²-x
3.x/x-y×y²/x+y-x四次方y/x四次方-y四次方÷x²/x²+y²
解方程:1.x-1/(x-2)+1=1/2-x
2.x+1/x-1-4/x²-1=1
3.1/x+3-2/3-x=1/x²-9

解方程:1.x-1/(x-2)+1=1/2-xX-1+(X-2)=-12X=2X=1经检验X=1是原方程的解.2.x+1/x-1-4/x²-1=1(X+1)^2-4=X^2-12X=2X=1X=1是增根,原方程无解.3.1/x+3-2/3-x=1/x²-9(X-3)+2(X+3)=13X=-2X=-2/3经检验是原方程...