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

歡迎您訪問數學考題練習:設實數m、n滿足m2n2+m2+n2+10mn!

數學考題練習:設實數m、n滿足m2n2+m2+n2+10mn

更新時間:2024-01-12 16:29:22作者:貝語網校

設實數m、n滿足m2n2+m2+n2+10mn+16=0,則有

A.

B.

C.或

D.

試題答案

C

試題解析

觀察m2n2+m2+n2+10mn+16=0等式要求m、n的值,只需將m2n2+m2+n2+10mn+16=0轉化為(mn+4)2+(m+n)2=0,再根據非負數的性質,可確定,解得m、n即為所求值.

解答:∵m2n2+m2+n2+10mn+16=0,

∴(m2n2+8mn+16)+(m2+2mn+n2)=0,

∴(mn+4)2+(m+n)2=0,

又∵(mn+4)2≥0,(m+n)2≥0,

∴(mn+4)2=0,(m+n)2=0,

即,

解得或.

故選C.

點評:本題考查完全平方式的應用、非負數的性質.解決本題的關鍵是運用完全平方式將m2n2+m2+n2+10mn+16=0轉化為(mn+4)2+(m+n)2=0,得到方程,進而求出m、n的值.

為您推薦

數學考題練習:如果要使a+b>0且ab<0,那么只要

如果要使a+b>0且ab<0,那么只要A.a>0且b<0B.a<0且b>0C.a和b異號D.a和b異號,且負數的絕對值較小

2024-01-12 16:29

數學考題練習:水池中原有水5升,現每分鐘從池中放水1升,則水

水池中原有水5升,現每分鐘從池中放水1升,則水池中的存水量W(升)與放水時間t(分)之間的關系圖象大致是A.B.C.D.

2024-01-12 16:29

數學考題練習:從長度分別為1,3,5,7,9個單位的5條線段

從長度分別為1,3,5,7,9個單位的5條線段中任取3條作邊,能組成三角形的概率為A.B.C.D.

2024-01-12 16:29

數學考題練習:在梯形ABCD中,AD∥BC,中位線長為5,高

在梯形ABCD中,AD∥BC,中位線長為5,高為6,則它的面積是A.30B.20C.15D.10

2024-01-12 16:29

數學考題練習:當x-y=1時,那么x4-xy3-x3y-3x

當x-y=1時,那么x4-xy3-x3y-3x2y+3xy2+y4的值是A.-1B.0C.1D.2

2024-01-12 16:29

數學考題練習:如圖所示,正比例函數y=kx與反比例函數的圖象

如圖所示,正比例函數y=kx與反比例函數的圖象交于點A(-3,2).(1)試確定上述正比例函數與反比例函數的解析式;(2)根據圖象回答,在第二象限內,當x取何值時,反比例函數的值大于正比例函數的值?(3)P(m,n)是反比例函數圖象上的一動

2024-01-12 16:29

加載中...
主站蜘蛛池模板: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |