本课配套习题挑战模式1/5
单选题
难度系数:
1.下列多项式是二次三项式的是()
A: a2+b2 |
B: x+y+7 |
C: 5-x-y2 |
D: x2-y2+x-y |
一次做对,真牛!
+5奖励规则>
- 提示1:5aSa6aG55byP5qyh5pWw5Y+K6aG555qE5qaC5b+1
- 答案:Qw==
5aSa6aG55byP6YeM77yM5qyh5pWw5pyA6auY6aG555qE5qyh5pWw77yM5Y+r5YGa5aSa6aG55byP55qE5qyh5pWw77yb5q+P5Liq5Y2V6aG55byP5Y+r5YGa5aSa6aG55byP55qE6aG544CC5pWF6YCJQ+OAgg==
本课配套习题挑战模式2/5
单选题
难度系数:
2.与2a-1的和是8的数是()
A: (2a-1)+8 |
B: 8-2a-1 |
C: 8-(2a-1) |
D: 2a-1-8 |
一次做对,真牛!
+5奖励规则>
- 提示1:5rOo5oSP5piv6KKr5YeP5pWw5piv5pW05L2T
- 答案:Qw==
6K6+5LiOMmEtMeeahOWSjOaYrzjnmoTmlbDmmK88aW1nIHdpZHRoPTEwIGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0FBLzM0L3JCQUNGRlRJcExTd1I3aHZBQUFCSzJrUXJOODc2Ny5wbmciPuW+lzxpbWcgd2lkdGg9MTk0IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzNFL0IxL3JCQUNKbFRJcExTQTdxa3JBQUFDdHlTTWUtUTU2Ni5wbmciPg==
本课配套习题挑战模式3/5
单选题
难度系数:
3.x表示一个两位数,y表示一个三位数,如果把x放在y的左边形成一个五位数,用代数式表示这个五位数可表示为()
A: xy |
B: x+y |
C: 100x+y |
D: 1000x+y |
一次做对,真牛!
+5奖励规则>
- 提示1:Mw==
- 答案:RA==
eOihqOekuuS4gOS4quS4pOS9jeaVsO+8jOimgeihqOekuuS6lOS9jeaVsO+8jOmcgOimgeS5mOS7pTEwMDDvvJt56KGo56S65LiA5Liq5LiJ5L2N5pWw77yM5pWw5L2N5rKh5pyJ6LCD5pW077yM5pWF5pyA5ZCO55qE5LqU5L2N5pWw5pivMTAwMHgreeOAgg==
本课配套习题挑战模式4/5
单选题
难度系数:
4.下列各式不是整式的是()
A: 3x2+5y |
B: x2-2xy-y2 |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:5rOo5oSP5Yy65YiG5pW05byP5ZKM5YiG5byP
- 答案:Qw==
Q+S4reeahDxpbWcgd2lkdGg9MzIgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvRUYvckJBQ0oxVElwTDNpQzNzQkFBQUJWWi1abXg0NTY4LnBuZyI+5piv5YiG5byP77yM5LiN5piv5pW05byP77yM5pWF6YCJQ+OAgg==
本课配套习题挑战模式5/5
单选题
难度系数:
5.多项式1+2xy-3xy2的次数及最高次项的系数分别是()
A: 3,-3 |
B: 2,-3 |
C: 5,-3 |
D: 2,3 |
一次做对,真牛!
+5奖励规则>
- 提示1:5aSa6aG55byP55qE5qyh5pWw5oyH5aSa6aG55byP6YeM77yM5qyh5pWw5pyA6auY6aG555qE5qyh5pWw
- 提示2:57O75pWw5rOo5oSP56ym5Y+3
- 答案:QQ==
5aSa6aG55byPMSsyeHktM3h5PHN1cD4yPC9zdXA+55qE5qyh5pWw5oyH5YW25Lit5qyh5pWw5pyA6auY6aG555qE5qyh5pWw77yM5Y2zLTN4eTxzdXA+Mjwvc3VwPueahOasoeaVsO+8jOS4ujPvvJvmnIDpq5jmrKHpobktM3h5PHN1cD4yPC9zdXA+55qE57O75pWw5pivLTMu5pWF6YCJQQ==