阅读与应用计算:
,
解:因为:
=
,
=
,
=
,…
=
,
所以:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/899c4ed98718b6d3c6d81abfa3ea5eb2.png)
=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4228d7122c3b804ae2a9af8c003d6e4.png)
=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/206347a522d33e103e08db93a5809821.png)
=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451b766e96ac4c7ecab490ffe6a475fb.png)
=
,
计算:
(1)
+
+
+…+
;
(2)
+
+
+…+
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/899c4ed98718b6d3c6d81abfa3ea5eb2.png)
解:因为:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a3dc5c2645ebac0351b4abfba6e005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d03aab1f072b9cd7ce1ffc9bf1e98695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06b9baa47b43cd8447499689e1aae0aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a3b992ecf930f77ab0d8b153bce8a44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83b2855c5c985f1c4fdc3b551f8df818.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/445d919091b75218ee7c3997f6115195.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be5c747ee8ed563dd6a3945ebed707e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb676a1339ba8d70533670c159df9df0.png)
所以:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/899c4ed98718b6d3c6d81abfa3ea5eb2.png)
=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4228d7122c3b804ae2a9af8c003d6e4.png)
=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/206347a522d33e103e08db93a5809821.png)
=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451b766e96ac4c7ecab490ffe6a475fb.png)
=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053c02c22ec9faaa6ca4094073aab2a.png)
计算:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a3dc5c2645ebac0351b4abfba6e005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06b9baa47b43cd8447499689e1aae0aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83b2855c5c985f1c4fdc3b551f8df818.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c59f5ac7da487de48fcd29aaba25b84.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88201ebf77d255b5c6b28ff0e60fff90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6be0cb2e294182470d698df62c6eee98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb2409dd4dcf6bf05c552bcce11ab13d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828f40d5e4fabe570236e077ab93ab10.png)
更新时间:2022-10-23 16:07:52
|
相似题推荐
解答题-计算题
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适中
(0.65)
【推荐1】计算:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d47b7f14c5ed8c154689e2af2d131f.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6649502f243206eda0a5d2c8c51c2758.png)
(3)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f992601a720cb237a3395ae9638a78c.png)
(4)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe2597cc746f72e6787fb38ed1d87ddf.png)
(5)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aba7ff60626800516fa845c470a93631.png)
(6)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3b6757c56d8e0e262966b5f04be93c.png)
(7)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6bd66388703d289ab3a7deb132295f3.png)
(8)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d47b7f14c5ed8c154689e2af2d131f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6649502f243206eda0a5d2c8c51c2758.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f992601a720cb237a3395ae9638a78c.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe2597cc746f72e6787fb38ed1d87ddf.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aba7ff60626800516fa845c470a93631.png)
(6)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3b6757c56d8e0e262966b5f04be93c.png)
(7)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6bd66388703d289ab3a7deb132295f3.png)
(8)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8f4f71acc5a20b915e4369e3100d65.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】操作探究:已知在纸面上有一数轴(如图所示).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/60f21999-d0f0-4fa9-8dc4-b988b4a1ffda.png?resizew=332)
操作一:
(1)折叠纸面,使表示
的点与表示1的点重合,那么表示3的点与表示 的点重合,此时若数轴上A,B两点之间距离为7(A在B的左侧),且A,B两点经折叠后重合,那么A,B两点表示的数分别是 , .
操作二:
(2)已知在数轴上点A表示的数是a,点A移动4个单位,此时点A表示的数和a互为相反数,那么a的值是 ;
操作三:
(3)A,B是数轴上的两点,点A表示的数是a,折叠纸面,使表示
的点与表示1的点重合,A,B两点也重合,若B点表示的数的绝对值是2,则a的值是 ;
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/60f21999-d0f0-4fa9-8dc4-b988b4a1ffda.png?resizew=332)
操作一:
(1)折叠纸面,使表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
操作二:
(2)已知在数轴上点A表示的数是a,点A移动4个单位,此时点A表示的数和a互为相反数,那么a的值是 ;
操作三:
(3)A,B是数轴上的两点,点A表示的数是a,折叠纸面,使表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
您最近一年使用:0次