本课配套习题挑战模式1/5
单选题
难度系数:
1.下列二次三项式是完全平方式的是( )
A: x2-8x-16 |
B: x2+8x+16 |
C: x2-4x-16 |
D: x2+4x+16 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruWujOWFqOW5s+aWueWFrOW8j++8mu+8iGHCsWLvvIk8c3VwPjI8L3N1cD49YTxzdXA+Mjwvc3VwPsKxMmFiK2I8c3VwPjI8L3N1cD7vvIzlr7nlkITpgInpobnliIbmnpDliKTmlq3lkI7liKnnlKjmjpLpmaTms5XmsYLop6Mu
- 答案:Qg==
6Kej77yaQeOAgeW6lOS4ung8c3VwPjI8L3N1cD4tOHgrMTbvvIzmlYVB6ZSZ6K+v77ybPGJyPkLjgIF4PHN1cD4yPC9zdXA+Kzh4KzE277yM5q2j56Gu77ybPGJyPkPjgIHlupTkuLp4PHN1cD4yPC9zdXA+LTR4KzTvvIzmlYVD6ZSZ6K+v77ybPGJyPkTjgIHlupTkuLp4PHN1cD4yPC9zdXA+KzR4KzTvvIzmlYVE6ZSZ6K+vLiA8YnI+5pWF6YCJQi4g
本课配套习题挑战模式2/5
单选题
难度系数:
2.已知x2+16x+k是完全平方式,则常数k等于( )
A: 64 |
B: 48 |
C: 32 |
D: 16 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruS5mOenr+mhueWFiOehruWumuWHuui/meS4pOS4quaVsOaYr3jlkow477yM5YaN5qC55o2u5a6M5YWo5bmz5pa55YWs5byP55qE57uT5p6E54m554K55rGC5Ye6OOeahOW5s+aWueWNs+WPry4=
- 答案:QQ==
6Kej77ya4oi1MTZ4PTLDl3jDlzjvvIw8YnI+4oi06L+Z5Lik5Liq5pWw5piveOOAgTg8YnI+4oi0az04PHN1cD4yPC9zdXA+PTY0LiA8YnI+5pWF6YCJQS4g
本课配套习题挑战模式3/5
单选题
难度系数:
3.多项式4x2+1加上一个单项式后,使它能成为一个二项整式的完全平方,则满足条件的单项式有( )
A: 1个 |
B: 2个 |
C: 3个 |
D: 4个 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOimgeaDs+aKiuS4gOWkmumhueW8jzR4PHN1cD4yPC9zdXA+KzHmiJDkuLrkuozpobnlvI/vvIzlupTliIbkuKTnp43mg4XlhrXogIPomZHvvJrvvIgx77yJ6aaW6aG55pivNHg8c3VwPjI8L3N1cD7vvIzvvIgy77yJ5Lit6Ze06aG55pivNHg8c3VwPjI8L3N1cD4u
- 答案:Qw==
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
本课配套习题挑战模式4/5
单选题
难度系数:
4.若a2+2b2+2ab−b+=0,则a,b的值分别为( )
A: , |
B: , |
C: , |
D: , |
一次做对,真牛!
+5奖励规则>
- 提示1:IOWwhuWOn+W8j+mFjeaIkOS4pOS4quWujOWFqOW5s+aWueW8j++8jOS7juiAjOagueaNruWujOWFqOW5s+aWueeahOmdnui0n+aAp+WNs+WPr+W+l+WHuuetlOahiC4=
- 答案:QQ==
6Kej77ya5Y6f5byP5Y+v5YyW5Li677ya77yIYSti77yJPHN1cD4yPC9zdXA+K++8iGItPGltZyB3aWR0aD02IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzNDLzA1L3JCQUNFMU5zTUVxeDZYSktBQUFCSEdqTWpGMDg3OC5wbmciPu+8iTxzdXA+Mjwvc3VwPj0w77yMPGJyPuaVheWPr+W+l++8mmE9LWLvvIxiPTxpbWcgd2lkdGg9NiBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8zQy8wNS9yQkFDRTFOc01FcXg2WEpLQUFBQkhHak1qRjA4NzgucG5nIj4uIDxicj7mlYXpgIlBLiA=
本课配套习题挑战模式5/5
单选题
难度系数:
5.若a,b,c为△ABC的三边,且关于x的二次三项式x2+2(a+b+c)x+3(ab+bc+ca)为完全平方式,则△ABC是( )
A: 直角三角形 |
B: 等边三角形 |
C: 等腰直角三角形 |
D: 只有两边相等的等腰三角形 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOeUsXg8c3VwPjI8L3N1cD4rMu+8iGErYitj77yJeCsz77yIYWIrYmMrY2HvvInkuLrlrozlhajlubPmlrnlvI/lj6/lvpcz77yIYWIrYmMrY2HvvIk977yIYStiK2PvvIk8c3VwPjI8L3N1cD7vvIzov5nmoLfmiJHku6zpgJrov4fphY3mlrnlsLHog73lvpflh7rnrZTmoYgu
- 答案:Qg==
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