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数学题:(x+2)(x-1)分之1+x除以(x-2+x+2分之3)
人气:382 ℃ 时间:2020-01-30 04:07:14
解答
原定=(x+1)/(x+2)(x-1)÷(x²-4+3)/(x+2)
=(x+1)/(x+2)(x-1)*(x+2)/(x+1)(x-1)
=1/(x-1)²
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