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歡迎您訪問數學考題練習:若使式子從左到右變形成立,應滿足的條件為!

數學考題練習:若使式子從左到右變形成立,應滿足的條件為

更新時間:2024-01-12 16:38:59作者:貝語網校

若使式子從左到右變形成立,應滿足的條件為

A.x+2>0

B.x+2=0

C.x+2<0

D.x+2≠0

試題答案

D

試題解析

觀察等式,顯然是根據分式的基本性質,分子和分母同時乘以了x+2,則在從左到右變形中,只需保證x+2≠0即可.

解答:根據分式的基本性質,則在上述變形中,只需x+2≠0.

故選D.

點評:此題考查了分式的基本性質,比較簡單.

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