已知指数函数
在定义域内单调递减,二次函数
的图象顶点的横坐标
.
(1)求
的取值范围;
(2)比较
与
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f61fc15df4f32a3fa2fc9c89cafaa108.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53be61cd85ec86aabd164cae0265246b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f1becd6b1de13a3b1d80a65eb112f49.png)
(2)比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe2b05214c8b22507f0c36b110593d0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5106dbdadcc154f73ee91501ae4d43ff.png)
更新时间:2023-12-20 12:03:07
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【推荐1】已知函数
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(1)当
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(2)若函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f8891ef3336dca14f2030e2bdf11485.png)
(1)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐2】已知函数
.
(1)若
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(2)若
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(1)若
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
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【推荐1】已知a>0,b>0,求证:
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【推荐2】若实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e1fbe0fb49725cf6d1e689ee8986d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)对任意正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc98f6e2b1d41bc552c083979f53a83d.png)
(3)对任意两个不相等的正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe2b05214c8b22507f0c36b110593d0a.png)
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【推荐1】求出一个数学问题的正确结论后,将其作为条件之一提出与原来问题有关的新问题,我们把它称为原来问题的一个“逆向”问题.例如,原来问题是“若直角三角形的两条直角边长分别为3和4,求该直角三角形的面积”,求出面积6后,它的一个“逆向”问题可以是“若直角三角形的面积为6,一条直角边长为3,求另一条直角边的长”.试给出问题“已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9678ae57ecdf808530b4cbc2ca0f12e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772d526e30c6631f2047e9cd19f01f6b.png)
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