初二数学 (北师版)
二次根式
本课配套习题挑战模式1/5
单选题
难度系数:
1.已知a=+1,b=,则a与b的关系是( )
A: a=b |
B: ab=1 |
C: a=-b |
D: ab=-1 |
一次做对,真牛!
+5奖励规则>
- 提示1:IGI9PGltZyB3aWR0aD0yNSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC82Ny8wMS9yQkFDRkZPWUpIT1JPZkt0QUFBQmYwajZKVnM5MzUucG5nIj49PGltZyB3aWR0aD0xNyBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9BMy8yNS9yQkFDRTFPWUpIT1QzaVd4QUFBQmRoejBxOEUyMzgucG5nIj4rMQ==
- 答案:QQ==
6Kej77yaYj08aW1nIHdpZHRoPTI1IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzY3LzAxL3JCQUNGRk9ZSkhPUk9mS3RBQUFCZjBqNkpWczkzNS5wbmciPj08aW1nIHdpZHRoPTEwNCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9BMy8yNS9yQkFDRTFPWUpIUHdhZmg5QUFBQ3l3aGNuZTg4NTAucG5nIj4rMTxicj7iiLTpgIlBPGJyPg==
本课配套习题挑战模式2/5
单选题
难度系数:
2.把分母有理化后得( )
A: 4b |
B: 2 |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:IOWFiOe6puWIhu+8jOWGjeWIhuavjeacieeQhuWMlg==
- 答案:RA==
6Kej77yaPGltZyB3aWR0aD0zMSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9BMy8yNS9yQkFDRTFPWUpIbkQyakJ2QUFBQjd3cWpISXcxOTYucG5nIj49PGltZyB3aWR0aD0zNCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC82Ny8wMS9yQkFDRkZPWUpIcWdkQ1lqQUFBQ0V5Q3gtNzg1NDMucG5nIj49PGltZyB3aWR0aD01NCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9BMy8yNi9yQkFDRTFPWUpIcWdScmk2QUFBQ2VYZVhvdkExMTMucG5nIj48YnI+6YCJRDxicj4=
本课配套习题挑战模式3/5
单选题
难度系数:
3.已知a=,b=,则的值为( )
A: 0 |
B: 1 |
C: 2 |
D: -2 |
一次做对,真牛!
+5奖励规则>
- 提示1:IGE9PGltZyB3aWR0aD04NSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9BMy8yNi9yQkFDRTFPWUpJNlF3X1ZwQUFBQ1pUajY1cnMzODMucG5nIj4=
- 提示2:IGI9PGltZyB3aWR0aD04NSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC82Ny8wMS9yQkFDRkZPWUpJNlNDTlJxQUFBQ2FVYk9UeTQwMDYucG5nIj4=
- 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.化简等于( )
A: 2a+2 |
B: 4a+2 |
C: 4 |
D: 4 |
一次做对,真牛!
+5奖励规则>
- 提示1:IDxpbWcgd2lkdGg9MTEwIGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzY3LzAxL3JCQUNGRk9ZSklEVEUtVWRBQUFDZVdRQTN5RTU4Mi5wbmciPuWIhuWIq+i/m+ihjOWIhuavjeacieeQhuWMlg==
- 答案:Qw==
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
本课配套习题挑战模式5/5
单选题
难度系数:
5.分母有理化:=( )
A: |
B: |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:IOWFiOWIhuWtkOWIhuavjeWQjOS5mOS7pe+8iDErPGltZyB3aWR0aD0xNyBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9BMy8yNS9yQkFDRTFPWUpIT1QzaVd4QUFBQmRoejBxOEUyMzgucG5nIj4rPGltZyB3aWR0aD0xNyBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9BMy8yNi9yQkFDRTFPWUpJZXkyd1otQUFBQlpHZVpCVm8xNzkucG5nIj7vvIk=
- 提示2:IOaVtOeQhuWQjuWGjei/m+ihjOWIhuavjeacieeQhuWMlg==
- 答案:Qw==
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