1 . 如图,给出函数
的部分图象.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/b4ae34aa-0fdb-4eec-bca3-d295c8fafee1.png?resizew=161)
(1)请在图中同一坐标系内画出函数
的图象.设
与
在
轴左边的交点为
,试用二分法求出
的横坐标
的近似解(精确度为0.3);
(2)用
表示
,
中的较大者,记为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e4ed159e3b82a2f8131c99117ee70e0.png)
,请写出
的解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/318a16f1950d06e5500c76d8f81a507f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/b4ae34aa-0fdb-4eec-bca3-d295c8fafee1.png?resizew=161)
(1)请在图中同一坐标系内画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557eb194cf0abe382609f8e1325b4197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
(2)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531bcdb6324cb5a759301daddf9768c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e4ed159e3b82a2f8131c99117ee70e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3682b41be6fbf083088212c1c6ffa7ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531bcdb6324cb5a759301daddf9768c0.png)
您最近一年使用:0次
2 . 已知函数
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/b597cf38-6419-45cd-91e8-80acbeade933.png?resizew=314)
(1)完成表一中
对应的
值,并在坐标系中用描点法作出函数
的图象:(表一)
(2)根据你所作图象判断函数
的单调性,并用定义证明;
(3)说明方程
的根在区间
存在的理由,并从表二中求使方程
的根的近似值达到精确度为0.01时运算次数
的最小值并求此时方程
的根的近似值,且说明理由.
(表二)二分法的结果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f199b227874ac5d678604b9c9f317e10.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/b597cf38-6419-45cd-91e8-80acbeade933.png?resizew=314)
(1)完成表一中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
0.25 | 0.5 | 0.75 | 1 | 1.25 | 1.5 | |
0.08 | 1.82 | 2.58 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)说明方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b92b70365c63607daecdc8deb73ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45dfe3fcb2968771ec338e0fbd4a71f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b92b70365c63607daecdc8deb73ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b92b70365c63607daecdc8deb73ecf.png)
(表二)二分法的结果
运算次数 | 左端点 | 右端点 | ||
-0.537 | 0.6 | 0.75 | 0.08 | |
-0.217 | 0.675 | 0.75 | 0.08 | |
-0.064 | 0.7125 | 0.75 | 0.08 | |
-0.064 | 0.7125 | 0.73125 | 0.011 | |
-0.03 | 0.721875 | 0.73125 | 0.011 | |
-0.01 | 0.7265625 | 0.73125 | 0.011 |
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