请先阅读下列一组内容,然后解答问题:
因为:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41dee008a9553f445082a055da4acd9.png)
所以:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eef72ba2f44e11a3226f4b1db7ea6ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7352f3c8df3920ab53e00ed0b9ef15a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a61d563ca2e99648d5dca387051a5ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ad7355fe293a94f702550f2a6a19f5.png)
.
(1)
;
(2)
.
因为:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41dee008a9553f445082a055da4acd9.png)
所以:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eef72ba2f44e11a3226f4b1db7ea6ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7352f3c8df3920ab53e00ed0b9ef15a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a61d563ca2e99648d5dca387051a5ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ad7355fe293a94f702550f2a6a19f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411a9bde4ebffa95670a0b67ddf39984.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d943cb0806ae7b400e61cf394d3f06.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7821d300524acf323b250e313b79a7e9.png)
更新时间:2019-01-30 18:14:09
|
相似题推荐
解答题-计算题
|
适中
(0.65)
【推荐1】观察下列等式:
①32﹣12=8×1
②52﹣32=8×2
③72﹣52=8×3
④92﹣72=8×4
(1)请你紧接着写出两个等式:
⑤ ;
⑥ ;
(2)利用这个规律计算:20152﹣20132的值.
①32﹣12=8×1
②52﹣32=8×2
③72﹣52=8×3
④92﹣72=8×4
(1)请你紧接着写出两个等式:
⑤ ;
⑥ ;
(2)利用这个规律计算:20152﹣20132的值.
您最近一年使用:0次
解答题-计算题
|
适中
(0.65)
【推荐2】七年级某班数学小组研究系列算式:
,
,
....,将算式计算过程进行变形后,得到如下规律:
;
;
;
……
(1)根据以上规律,直接写出
的相应变形算式;
(2)请用含n的代数式直接表示
与
之积的计算结果,并通过计算验证结果的正确性.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4193e267ebb5da251f0b79c78954626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c49126dfe910c3290f329993e7d91d86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37085926f04cf2b47e64738014b14883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f2ffbfd97cde4881c896f757ddb1cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed03fcb012bb605d455f35e36829c4ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05f00ff3d5e84dc0e5d2c002a423f8de.png)
……
(1)根据以上规律,直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32f238064b3a3cf34f9f73088e4948a.png)
(2)请用含n的代数式直接表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14a00d247205e029ca5a964ae61b5a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e50f507cc02d374118526d72adf34083.png)
您最近一年使用:0次