(1)填空:
__________.
__________.
__________.
……
(2)猜想:
_________(n为很大的正整数).
(3)证明(2)中的猜想.
(4)利用你发现的规律计算:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f682d60f3e86540a3d6c9073feee8eb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92bfebd91351426b39741c97e3330b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aeb1d5bf3c188d0833f0ae6b2063ece.png)
……
(2)猜想:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc71d8a7d518d2f75203e5ddde31142.png)
(3)证明(2)中的猜想.
(4)利用你发现的规律计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb514c713d5e798762cccd32a37e77e.png)
2024八年级·全国·竞赛 查看更多[2]
更新时间:2024-02-04 13:57:06
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【知识点】 多项式乘法中的规律性问题解读
相似题推荐
解答题-计算题
|
较易
(0.85)
【推荐1】观察以下等式:
;
;
;
;
;
;
……
(1)按以上等式的规律,填空:
;
.
(2)根据(1)的规律化简:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98d472bdb2aa79f2095f4a7ee4e5410b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c97f3e0b3eb6ad36aaba9e6c3c6bbe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03314b1da16159fc70f101fcae8b53a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6576e990a8d87d0bf285750cfa090168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/322465ea24e9d30ab731885da827a6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c658e70266a3b90968b829e8024027b.png)
……
(1)按以上等式的规律,填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b71dc5e2c1201c3b771b58a21168c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b72496aa17a13d1542e0492ebff3ee.png)
(2)根据(1)的规律化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a0369d951e65cb62de7398608b0bd3f.png)
您最近一年使用:0次
解答题-计算题
|
较易
(0.85)
【推荐2】有一系列等式:
第1个:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19ac464ac5242af3eed2b96ba1918da.png)
第2个:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aa9f976a7b83a840cb7ed8d65e42ee1.png)
第3个:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69dd1282d17e0a4403c3faf3220bed5.png)
第4个:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9bd8c68914e5965b1f86ba2c933cb30.png)
……
(1)请写出第5个等式:______.
(2)请写出第n个等式,并加以验证.
(3)依据上述规律,计算:
.
第1个:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19ac464ac5242af3eed2b96ba1918da.png)
第2个:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aa9f976a7b83a840cb7ed8d65e42ee1.png)
第3个:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69dd1282d17e0a4403c3faf3220bed5.png)
第4个:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9bd8c68914e5965b1f86ba2c933cb30.png)
……
(1)请写出第5个等式:______.
(2)请写出第n个等式,并加以验证.
(3)依据上述规律,计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f636e5b10cf37a0099b9ff7705b863.png)
您最近一年使用:0次