解答题-计算题 适中0.65 引用2 组卷154
观察下列等式
,
,
,
将以上三个等式两边分别相加得:
.
(1)猜想并写出:![](https://img.xkw.com/dksih/QBM/2012/8/22/1577488843603968/1577488845185024/STEM/e8146cf09d664d729debaca4c5336003.png)
(2)直接写出下列各式的计算结果:
①![](https://img.xkw.com/dksih/QBM/2012/8/22/1577488843603968/1577488845185024/STEM/60d68d19192a43508c02c06f8761aaad.png)
②![](https://img.xkw.com/dksih/QBM/2012/8/22/1577488843603968/1577488845185024/STEM/46e42057a7df4f528f6597844dd5e434.png)
(3)探究并计算:
.
将以上三个等式两边分别相加得:
(1)猜想并写出:
![](https://img.xkw.com/dksih/QBM/2012/8/22/1577488843603968/1577488845185024/STEM/e8146cf09d664d729debaca4c5336003.png)
(2)直接写出下列各式的计算结果:
①
![](https://img.xkw.com/dksih/QBM/2012/8/22/1577488843603968/1577488845185024/STEM/60d68d19192a43508c02c06f8761aaad.png)
②
![](https://img.xkw.com/dksih/QBM/2012/8/22/1577488843603968/1577488845185024/STEM/46e42057a7df4f528f6597844dd5e434.png)
(3)探究并计算:
![](https://img.xkw.com/dksih/QBM/2012/8/22/1577488843603968/1577488845185024/STEM/48887e02cc2a4afaacd7116f4adc8c71.png)
11-12七年级上·湖北孝感·期中
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