名校
1 . 已知函数
,
(
且均不为1,
)
(1)当
,
时,解关于
的不等式
;
(2)当
是三角形的三边长且满足
,且
时,试判断函数
零点的个数,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a9b5a2da774c76395411bc77c8d3ec2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bf0e209106aef5f6c76d194d3099dc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a521891098b625f372ff648d110afe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e8ed1aeec813c03ae67406bedf71ea9.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad5e009486af263893ca8290be72f258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eee31b9dffcd91ff2f5477410bc09f95.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efbdd3c899f2a399c94a105c91d5ecce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c459693137a534788acf8937822ced86.png)
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名校
2 . 函数
.
(1)若a=1,求y=f(x)在点(1,f(1))处的切线方程;
(2)若
恒成立,求a的值;
(3)若
有两个不相等的实数解
,证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b93a4f5b20d30169bd85e5c82cf50da0.png)
(1)若a=1,求y=f(x)在点(1,f(1))处的切线方程;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89ca4c9087d7b6603737d6354a4bf936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6f8062ae945803fa02f0fac5c4ba2f9.png)
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