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歡迎您訪問每日一練:若abcde<0,則a、b、c、d、e中負數的個數!

每日一練:若abcde<0,則a、b、c、d、e中負數的個數

更新時間:2024-01-12 12:49:44作者:貝語網校

若abcde<0,則a、b、c、d、e中負數的個數是

A.1

B.1或3

C.2或4

D.1或3或5

試題答案

D

試題解析

幾個有理數相乘的積的符號是由負因數的的個數確定的:負因數的個數是奇數時,其積是負號;

負因數的個數是偶數時,其積是正號。由于abcde<0,根據上面的規律,得其中的負因數的個數必是奇數,可能是1個或3個或5個。選D。

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