比较下列式子大小
(1)
与![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec1694d32baecc3624b3ded96f7c1156.png)
(2)若
,
与
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c98d0c8e5ef195aed995d2ec98f81de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec1694d32baecc3624b3ded96f7c1156.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5842f47b99932df68efbb64eb847e956.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70dd6be6008dcc9de3bcdbdc486e5ce8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f49a2a7846d996407a3a6d802b65e48.png)
更新时间:2023-10-22 11:11:17
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【知识点】 作差法比较代数式的大小解读
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解答题-问答题
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较易
(0.85)
解题方法
【推荐1】已知实数a,b满足:
,
.
(1)求
的取值范围;
(2)已知
,试比较M,N的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97d0ee7b8d3fa2c655c90a05c6b52338.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed9cb70d70d920d09131d22c04b443.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbcb79c362bddb898f8a9d02a5f5d085.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c706a5b045e3c4ba0df1b6c345e5bded.png)
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解答题-问答题
|
较易
(0.85)
名校
解题方法
【推荐2】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)
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