不要检验!
不要检验!
1.x+1/x-1 - 3x-3/x+1 = 2
2.7/x^2+x + 3/x^2-x = 6/x^2-1
1.x+1/x-1 - 3x-3/x+1 = 2
2.7/x^2+x + 3/x^2-x = 6/x^2-1
数学人气：332 ℃时间：2020-02-05 11:19:06
优质解答
（1）.[(X+1)"2]/[(X-1)(X+1)]-[3*(X-1)"2]/[(X-1)(X+1)]=2 (X"2+1+2X-3*X"2-3+6X)/(-1)(+1)=2 -2X"2+8X-2=2X"2-2 X=0或2
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