亚洲男人天堂av,国产一区二区久久精品,国产精品一区二区久久精品,国产精品久久久久久一区二区三区,五月婷婷在线观看视频,亚洲狠狠色丁香婷婷综合

歡迎您訪問數(shù)學(xué)考題練習(xí):下列說法正確的個(gè)數(shù)為①若a≠b,則|a|≠|(zhì)b!

數(shù)學(xué)考題練習(xí):下列說法正確的個(gè)數(shù)為①若a≠b,則|a|≠|(zhì)b

更新時(shí)間:2024-01-12 16:41:20作者:貝語網(wǎng)校

下列說法正確的個(gè)數(shù)為

①若a≠b,則|a|≠|(zhì)b|

②若|a|=|b|,則a=b.

③若a2=b2,則a=b

④若|a|>|b|,則a>b.

A.0個(gè)

B.2個(gè)

C.3個(gè)

D.4個(gè)

試題答案

A

試題解析

根據(jù)絕對值的概念:數(shù)軸上某個(gè)數(shù)與原點(diǎn)的距離可判斷①②④的正誤,再根據(jù)乘方的意義可判斷出③的正誤,即可得到答案.

解答:①若a≠b,則|a|≠|(zhì)b|錯誤,相反數(shù)不相等,但是絕對值相等;

②若|a|=|b|,則a=b,錯誤,相反數(shù)的絕對值也相等;

③若a2=b2,則a=b,錯誤,相反數(shù)的平方也相等;

④若|a|>|b|,則a>b,錯誤,兩個(gè)負(fù)數(shù)相比較,絕對值大的反而?。?/p>

故此題中說法正確的個(gè)數(shù)為0個(gè).

故選:A.

點(diǎn)評:此題主要考查了絕對值的概念和乘方的意義,關(guān)鍵是正確理解絕對值的概念.

主站蜘蛛池模板: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |