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(x+1分之1)-(x2-1分尘滚之x+3)/ (x²稿肢-2x+1分之x²+4x+3)
=1/(x+1)-(x+3)/(x-1)(x+1)×(x-1)²/派敬余(x+1)(x+3)
=1/(x+1)-(x-1)/(x+1)²
=[(x+1)-(x-1)]/(x+1)²
=2/(x+1)²
=1/(x+1)-(x+3)/(x-1)(x+1)×(x-1)²/派敬余(x+1)(x+3)
=1/(x+1)-(x-1)/(x+1)²
=[(x+1)-(x-1)]/(x+1)²
=2/(x+1)²
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题目素(x+1)分之1-(x²-1)分之x+3/ (x²-2x+1)分之(x²+4x+3)
前面打错了
追答
我懂你的意思的,就是做的(x+1)分之1
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