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歡迎您訪問(wèn)數(shù)學(xué)考題練習(xí):已知x、y滿(mǎn)足,則(x+y)2008的值為!

數(shù)學(xué)考題練習(xí):已知x、y滿(mǎn)足,則(x+y)2008的值為

更新時(shí)間:2024-01-12 16:26:00作者:貝語(yǔ)網(wǎng)校

已知x、y滿(mǎn)足,則(x+y)2008的值為

A.9

B.-9

C.1

D.-1

試題答案

C

試題解析

根據(jù)非負(fù)數(shù)的性質(zhì)列出方程求出x、y的值,代入所求代數(shù)式計(jì)算即可.

解答:根據(jù)題意得:x-5=0且y+4=0,

解得:x=5,y=-4,

∴(x+y)2008=(5-4)2008=1.

故選C.

點(diǎn)評(píng):本題考查了非負(fù)數(shù)的性質(zhì):幾個(gè)非負(fù)數(shù)的和為0時(shí),這幾個(gè)非負(fù)數(shù)都為0.

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