1/5单选题
难度：
1.函数
的定义域为（）
的定义域为（） | A |  |
| B |  |
| C |  |
| D |  |
- 提示1：
- 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
正确答案：Qw==
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
2/5单选题
难度：
2.函数
的定义域是（ ）
的定义域是（ ） | A |  |
| B |  |
| C |  |
| D |  |
- 提示1：
- 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
正确答案：Qw==
6Kej5p6Q77yaeOW6lOa7oei2szxpbWcgd2lkdGg9MTg3IGhlaWdodD00OCBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzYyLzYyL3JCQUNFMVNnd2ZpUXpfUTlBQUFEOUhMYkh1YzAwMi5wbmciPuaJgOS7peWHveaVsOeahOWumuS5ieWfn+S4ujxpbWcgd2lkdGg9MTIwIGhlaWdodD0yMyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzJFLzY0L3JCQUNKbFNnd2ZqVGJUNGVBQUFDWjdBYmFlQTA2Ny5wbmciPi4=
3/5单选题
难度：
3.若函数
的定义域是
，则函数
的定义域是（）
的定义域是，则函数的定义域是（） | A |  |
| B | |
| C |  |
| D |  |
- 提示1：
- PGltZyB3aWR0aD02MCBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yRS82NC9yQkFDSmxTZ3dmeVI5bHMzQUFBQjE1U2hfMFEyOTIucG5nIj7nmoTlrprkuYnln5/mjIfnmoTmmK88aW1nIHdpZHRoPTQwIGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzJFL0EyL3JCQUNKMVNnd2Z5Z2dPS2FBQUFCZE9feFNmSTk5Ni5wbmciPuS4rXjnmoTlj5blgLzojIPlm7Q=
- 提示2：
- 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
正确答案：Qw==
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
4/5单选题
难度：
4.已知函数
的定义域为
，则
的定义域为（）
的定义域为，则的定义域为（） | A |  |
| B |  |
| C |  |
| D |  |
- 提示1：
- PGltZyB3aWR0aD02MCBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yRS9BMi9yQkFDSjFTZ3dnREJzQm9fQUFBQjRHUldjNkk2MTcucG5nIj7nmoTlrprkuYnln5/mjIfnmoTmmK88aW1nIHdpZHRoPTQwIGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzYyLzYyL3JCQUNFMVNnd2dDekYzaWhBQUFCZnRLZkJNZzY1Ni5wbmciPuS4rTxpbWcgd2lkdGg9OCBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yRS9BMi9yQkFDSjFTZ3dnRFJYY2R2QUFBQkVwdWNBLXc4MTgucG5nIj7nmoTlj5blgLzojIPlm7Q=
- 提示2：
- 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
正确答案：Qw==
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
5/5单选题
难度：
5.已知函数
定义域是
，则
的定义域是（ ）
定义域是，则的定义域是（ ） | A |  |
| B |  |
| C |  |
| D |  |
- 提示1：
- 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
- 提示2：
- IOWboOS4uuWHveaVsDxpbWcgd2lkdGg9ODQgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvOEUvRjAvckJBQ0ZGU2d3Z1B6NUZISEFBQUNIR3FBYkpVMDMxLnBuZyI+5a6a5LmJ5Z+f5pivPGltZyB3aWR0aD01NiBoZWlnaHQ9MjMgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yRS82NC9yQkFDSmxTZ3dnUEQ3N0dMQUFBQmZONXNtOVk2NjEucG5nIj48aW1nIHdpZHRoPTI4MCBoZWlnaHQ9NDEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC82Mi82Mi9yQkFDRTFTZ3dnVEFPdWxvQUFBRWlqanB0LTAxNTcucG5nIj4=
正确答案：QQ==
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