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歡迎您訪問數學考題練習:如果不等式組的解集是x>7,則n的取值范圍是!

數學考題練習:如果不等式組的解集是x>7,則n的取值范圍是

更新時間:2024-01-12 16:46:49作者:貝語網校

如果不等式組的解集是x>7,則n的取值范圍是

A.n≥7

B.n≤7

C.n=7

D.n<7

試題答案

B

試題解析

求出每個不等式的解集,根據不等式的解集和不等式組的解集即可求出答案.

解答:,

∵解不等式①得:x>7,

∵不等式②的解集是x>n,不等式組的解集為x>7,

∴n≤7.

故選B.

點評:本題考查了解 才不等式和解一元一次不等式組的應用,主要考查學生的理解能力和計算能力.

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