本课配套习题挑战模式3/5
单选题
难度系数:
3.长方形的一边长是2a+3b,另一边长是a+b,则这个长方形的周长()
A: 12a+16b |
B: 6a+8b |
C: 3a+8b |
D: 6a+4b |
一次做对,真牛!
+5奖励规则>
- 提示1:5YWI5YiX5byP77yM5YaN6K6h566X
- 答案:Qg==
5ZGo6ZW/PTLDl++8iOmVvyvlrr3vvIk9PGltZyB3aWR0aD0yNjMgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvRjkvckJBQ0oxVEl0UmpUYVE0MUFBQURrNXdTOWhjNzQ4LnBuZyI+LOWNs+mAiULjgII=
本课配套习题挑战模式4/5
单选题
难度系数:
4.若使多项式2x3-8x2+x-1与多项式3x3+2mx2-5x+3相加后不含二次项,则m=()
A: 2 |
B: -2 |
C: 4 |
D: -8 |
一次做对,真牛!
+5奖励规则>
- 提示1:6ICD6JmR5ZCI5bm25ZCM57G76aG55ZCO77yM5LqM5qyh6aG555qE57O75pWw55qE5Luj5pWw5ZKM5Li66Zu2
- 答案:Qw==
Mng8c3VwPjM8L3N1cD4tOHg8c3VwPjI8L3N1cD4reC0xKzN4PHN1cD4zPC9zdXA+KzJteDxzdXA+Mjwvc3VwPi01eCszPTxpbWcgd2lkdGg9MjUyIGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzczLzJFL3JCQUNFMVRJdFJ2UlRIT0VBQUFFUGxHeUtIazE1MS5wbmciPi7iiLQ8aW1nIHdpZHRoPTE4NiBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9BQS80My9yQkFDRkZUSXRSdmdOUHd5QUFBQzczUldzMXc3MzkucG5nIj4u5pWF6YCJQw==
本课配套习题挑战模式5/5
单选题
难度系数:
5.若2xkyk+2与3x2yn的和为5x2yn,则2k-n=____.
A: 0 |
B: 2 |
C: 4 |
D: -2 |
一次做对,真牛!
+5奖励规则>
- 提示1:Mng8c3VwPms8L3N1cD55PHN1cD5rKzI8L3N1cD7kuI4zeDxzdXA+Mjwvc3VwPnk8c3VwPm48L3N1cD7mmK/lkIznsbvpobk=
- 提示2:5ZCM57G76aG55oyH77ya5omA5ZCr5a2X5q+N55u45ZCM77yM5LiU55u45ZCM5a2X5q+N55qE5oyH5pWw5Lmf55u45ZCM55qE6aG544CC
- 答案:QQ==
Sz0yLGsrMj1uLOKItG49NC4yay1uPTAu5pWF6YCJQQ==