计算:1.y/4x²-1/12y²+1/6xy 2.3/x-6/1-x-x+5/x²-x3.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-x2.x+1/x-1-4/x²-1=13.1/x+3-2/3-x=1/x²-9

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计算:1.y/4x²-1/12y²+1/6xy 2.3/x-6/1-x-x+5/x²-x3.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-x2.x+1/x-1-4/x²-1=13.1/x+3-2/3-x=1/x²-9
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计算:1.y/4x²-1/12y²+1/6xy 2.3/x-6/1-x-x+5/x²-x3.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-x2.x+1/x-1-4/x²-1=13.1/x+3-2/3-x=1/x²-9
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

计算:1.y/4x²-1/12y²+1/6xy 2.3/x-6/1-x-x+5/x²-x3.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-x2.x+1/x-1-4/x²-1=13.1/x+3-2/3-x=1/x²-9
解方程:1.x-1/(x-2)+1=1/2-x
X-1+(X-2)=-1
2X=2
X=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^2-1
2X=2
X=1
X=1是增根,
原方程无解.
3.1/x+3-2/3-x=1/x²-9
(X-3)+2(X+3)=1
3X=-2
X=-2/3
经检验是原方程的解.