1/5单选题
难度：
1.函数y＝f(x)的图象如图所示，其增区间是( )
| A |  |
| B | [－4，－3]∪[1,4] |
| C | [－3,1] |
| D | [－3,4] |
- 提示1：
- IOinguWvn+WbvuWDj++8jOWHveaVsOWcqFvvvI0zLDFd5Yy66Ze05LiK5ZGI5LiK5Y2H6LaL5Yq/77yB
正确答案：Qw==
6Kej5p6Q77ya6KeC5a+f5Zu+5YOP77yM5Ye95pWw5ZyoW++8jTMsMV3ljLrpl7TkuIrlkYjkuIrljYfotovlir/vvIHmlYXov5nkuKrljLrpl7TmmK/ljZXosIPlop7ljLrpl7TjgII=
2/5单选题
难度：
2.函数y＝(3k＋1)x＋b在R上是减函数，k的取值范围是( )
| A |  |
| B |  |
| C |  |
| D |  |
- 提示1：
- IOS4gOasoeWHveaVsOaYr+WHj+WHveaVsO+8jOWImTxpbWcgd2lkdGg9OCBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9DRi9BOS9yQkFDRTFQdHUxdng4elZFQUFBQkVwdWNBLXcyNDcucG5nIj7nmoTns7vmlbDmmK/otJ/mlbDvvIzmiYDku6U8aW1nIHdpZHRoPTY2IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzk4LzdGL3JCQUNGRlB0dTF1eGxCYzlBQUFCd21SNy1YYzc1NC5wbmciPg==
正确答案：QQ==
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
3/5单选题
难度：
3.函数y＝－x2的单调减区间是( )
| A |  |
| B | (－∞，0] |
| C | (－∞，0) |
| D | (－∞，＋∞) |
- 提示1：
- DQrnlLvlh7o8aT55PC9pPu+8ne+8jTxpPng8L2k+PHN1cD4yPC9zdXA+5ZyoPGI+UjwvYj7kuIrnmoTlm77osaHvvIzlj6/nn6Xlh73mlbDlnKhbMO+8jO+8i+KIninkuIrpgJLlh48uIDxicj4NCjxpbWcgd2lkdGg9OTggaGVpZ2h0PTg1IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvOTgvODAvckJBQ0ZGUHR1M0hTN09MTEFBQUdpQlB5cGFZNzMyLnBuZyI+
正确答案：QQ==
6Kej5p6Q77ya55S75Ye6PGk+eTwvaT7vvJ3vvI08aT54PC9pPjxzdXA+Mjwvc3VwPuWcqDxiPlI8L2I+5LiK55qE5Zu+6LGh77yM5Y+v55+l5Ye95pWw5ZyoWzDvvIzvvIviiJ4p5LiK6YCS5YePLiA8YnI+PGltZyB3aWR0aD05OCBoZWlnaHQ9ODUgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC85OC84MC9yQkFDRkZQdHUzSFM3T0xMQUFBR2lCUHlwYVk3MzIucG5nIj4=
4/5单选题
难度：
4.函数
的单调增区间是（ ）
的单调增区间是（ ） | A | [0，＋∞) |
| B | (－∞，0] |
| C | (－∞，0)，(0，＋∞) |
| D | (－∞，0)∪(0，＋∞) |
- 提示1：
- IOeUseS6juino+aekOW8j+S4reWHuueOsOS6hui0n+WPt++8jOaJgOS7peWHveaVsOeahOWbvuWDj+iusui/h+esrOS6jOWSjOesrOWbm+ixoemZkA==
正确答案：Qw==
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
5/5单选题
难度：
5.若函数f(x)在区间(a，b)上是增函数，在区间(b，c)上也是增函数，
则函数f(x)在区间(a，b)∪(b，c)上( )
则函数f(x)在区间(a，b)∪(b，c)上( )
| A | 增函数 |
| B | 减函数 |
| C | 增函数或减函数 |
| D | 无法确定 |
- 提示1：
- IOWmgjxpbWcgd2lkdGg9NjAgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvQ0YvQUEvckJBQ0UxUHR1NGVoVkM0dEFBQUJ5RUpFbGR3MTU0LnBuZyI+5ZyoKDDvvIzvvIviiJ4p5LiK5piv5aKe5Ye95pWw77yM5ZyoKO+8jeKInu+8jDAp5LiK5Lmf5piv5aKe5Ye95pWw77yM5L2G5ZyoKO+8jeKInu+8jDAp4oiqKDDvvIzvvIviiJ4p5LiK5bm25LiN5YW35pyJ5Y2V6LCD5oCnLg==
正确答案：RA==
6Kej5p6Q77ya5aaCPGltZyB3aWR0aD02MCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9DRi9BQS9yQkFDRTFQdHU0ZWhWQzR0QUFBQnlFSkVsZHcxNTQucG5nIj7lnKgoMO+8jO+8i+KIninkuIrmmK/lop7lh73mlbDvvIzlnKgo77yN4oie77yMMCnkuIrkuZ/mmK/lop7lh73mlbDvvIzkvYblnKgo77yN4oie77yMMCniiKooMO+8jO+8i+KIninkuIrlubbkuI3lhbfmnInljZXosIPmgKcuIOaJgOS7peaXoOazleehruWumu+8gQ==