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化简:a³-a²-a+1/a³-3a²+3a-1
人气:119 ℃ 时间:2020-03-13 07:01:59
解答
(a³-a²-a+1)/(a³-3a²+3a-1)
=(a-1)(a²-1)/(a-1)³
=(a-1)(a-1)(a+1)/(a-1)³
=(a+1)/(a-1)
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