1/4单选题
难度：
1.已知函数f(x)的图象如图所示，则此函数的值域是（）
| A |  |
| B |  |
| C |  |
| D |  |
- 提示1：
- DQrlj6/ku6XnnIvlh7rmnaXvvIzmnIDlpKflgLzmmK8y77yM5pyA5bCP5YC85pivLTIs
正确答案：RA==
6Kej5p6Q77ya6KeC5a+f5Zu+5YOP5Y+R546w77yM5Ye95pWw55qE5pyA5aSn5YC85pivMu+8jOacgOWwj+WAvOaYry0y77yM5omA5Lul77yM6YCJRA==
2/4单选题
难度：
2.二次函数
（ ）
（ ） | A |  |
| B |  |
| C |  |
| D |  |
- 提示1：
- IOmFjeaWueWPr+W+l++8mjxpbWcgd2lkdGg9MTA0IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0I0LzI5L3JCQUNFMVBra0M3UjdiQlpBQUFDVkI3Q0YwczAwOC5wbmciPuWboOS4ujxpbWcgd2lkdGg9NzYgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvQjQvMjkvckJBQ0UxUGtrQzd4dFo3ZUFBQUJfM0RCWmFFNjI0LnBuZyI+77yM5omA5Lul77yaPGltZyB3aWR0aD0xMDEgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNzYvODYvckJBQ0ZGUGtrQzdSS2VZaUFBQUNNUXhkNDg4MzI2LnBuZyI+
正确答案：RA==
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
3/4单选题
难度：
3.二次函数
()
() | A |  |
| B |  |
| C |  |
| D |  |
- 提示1：
- 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
- 提示2：
- 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
正确答案：Qg==
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
4/4单选题
难度：
4.已知
,则函数的值域是（）
,则函数的值域是（） | A |  |
| B |  |
| C |  |
| D |  |
- 提示1：
- IOi/meaYr+S4gOS4quWIhuW8j+Wei+WHveaVsO+8jOeUqOWIhuemu+W4uOaVsOazle+8jDxpbWcgd2lkdGg9MjM4IGhlaWdodD02MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0I0LzJBL3JCQUNFMVBra0ZMUW1BOWNBQUFFa0VYMXV2ODUxMi5wbmciPg==
- 提示2：
- IOaJgOS7pTxpbWcgd2lkdGg9NjkgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNzYvODcvckJBQ0ZGUGtrRktUMDd6U0FBQUNSRlc3UkFJODIxLnBuZyI+
正确答案：RA==
6Kej5p6Q77ya55So5YiG56a75bi45pWw5rOV5rGC5YC85Z+f77yMPGltZyB3aWR0aD0yMzQgaGVpZ2h0PTYyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvQjQvMkEvckJBQ0UxUGtrRkt3ekVORUFBQUVpaktxcFRZMjA4LnBuZyI+77yM5omA5LulPGltZyB3aWR0aD02OSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC83Ni84Ny9yQkFDRkZQa2tGS1QwN3pTQUFBQ1JGVzdSQUk4MjEucG5nIj7vvIznlKjljLrpl7TooajnpLrkuLo8aW1nIHdpZHRoPTc1IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzc2Lzg3L3JCQUNGRlBra0ZLRG5aQ0xBQUFDcDBmeTdiMDY5Ni5wbmciPi4=