先化简再求值:(x+1一)×,其中x=-
问题详情:
先化简再求值:(x+1一)×,其中x=-
【回答】
解:
=··································································· 1分
=························································································ 2分
=························································································ 3分
=···································································································· 4分
当=时·················································· 5分
原式==······················································································· 6分
知识点:分式的运算
题型:解答题
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