7/xx+x+1/xx-1=2/xx-x
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7/xx+x+1/xx-1=2/xx-x7/xx+x+1/xx-1=2/xx-x7/xx+x+1/xx-1=2/xx-x7/x(x+1)-1/(x+1)(x-1)=2/x(x-1)两边乘x(x+1)(
7/xx+x+1/xx-1=2/xx-x
7/xx+x+1/xx-1=2/xx-x
7/xx+x+1/xx-1=2/xx-x
7/x(x+1)-1/(x+1)(x-1)=2/x(x-1)
两边乘x(x+1)(x-1)
7(x-1)-x=2(x+1)
7x-7-x=2x+2
4x=9
x=9/4
分式方程要检验
经检验,x=9/4是方程的解
额、、我题没看懂、、xx是x的平方吗?
7/xx+x+1/xx-1=2/xx-x
解方程1/(xx+x)+1/(xx+3x+2)+1/(xx+5x+6)+1/(xx+7x+12)+1/(xx+9x+20)=5/(xx+11x-7
解方程1/(xx+x)+1/(xx+3x+2)+1/(xx+5x+6)+1/(xx+7x+12)+1/(xx+9x+20)=5/(xx+11x-708)
7/(XX+X)+1/(xx-x) =6/(xx-1)
解分式方程7/(XX+X)+1/(xx-x) =6/(xx-1)
7/(XX+X)+1/(xx-x) =6/(xx-1)
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