【用数学的眼光观察】
(1)在图1中,三种不同大小的正方形与长方形,拼成了一个如图2所示的正方形.根据图2中的阴影部分面积关系直接写出下列代数式
,
,
之间的数量关系:____________________;
根据(1)题中的等量关系,解决下列问题:
【用数学的思维思考】
(2)已知
,
,求
的值;
(1)在图1中,三种不同大小的正方形与长方形,拼成了一个如图2所示的正方形.根据图2中的阴影部分面积关系直接写出下列代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/631758fe5622770196dbf92c7e22e5eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f0281e6bbdbe08beeccb55adf84536.png)
根据(1)题中的等量关系,解决下列问题:
【用数学的思维思考】
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc5b4357fd97fc6a2328953fe45a294.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce109a1dc248c9d63f6c3156c4f42742.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019d4ad2e3fb4a7abb66e0e9e55b556.png)
更新时间:2024-05-14 14:08:51
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相似题推荐
解答题-计算题
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适中
(0.65)
【推荐1】(1)计算:式子
______(请直接写出这个常数);
(2)已知
,求
的值;
(3)若
的整数部分为x,小数部分为y,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb6ac15639bbe24ef2fb5129c71d762.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b43cd8ae81f9773af92a837c555203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a96a3511865fe2da3f937211fb781969.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778253bb417619fbd3f137f23e1b9c04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff05920f9ef5a8939df31eb07fd55110.png)
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名校
【推荐2】已知多项式
,多项式
.
(1)若多项式
是完全平方式,则
______;
(2)有同学猜测
的结果是定值,他的猜测是否正确,请说明理由;
(3)若多项式
的值为
,求x和n的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74845e8ba98ae623b285f2d7139a6f3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4548fa027fb9568628a5489b8bcb06d6.png)
(1)若多项式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad491410c7a8e9aa2f002777a0b6aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
(2)有同学猜测
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ef0af818d5fd20582a1e0a8783edf07.png)
(3)若多项式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad491410c7a8e9aa2f002777a0b6aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
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解答题-问答题
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适中
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【推荐1】若
满足
,求
的值.
解:设
,
,则
,
,
.
请仿照上面的方法求解下面问题:
满足
,求
的值;
(2)
,求
;
(3)已知正方形
的边长为
,
,
分别是
、
上的点,且
,
,长方形
的面积是192,分别以
、
为边作正方形,求阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b175010d5b2237d69344f6d69eff87bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c6e6e439f0d157417527d51e96457d.png)
解:设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b84a62d329ac6b8568fb91331294cea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31fae5ce21f7e51cfd2e1731225a4ac4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4cc7831b344e758323e398cf8cd5e15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49865ef26f45600df391552dcf2aa126.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c2bc418d8ebbbaa544156ef3abedf1.png)
请仿照上面的方法求解下面问题:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9e5ff6fe39b8062d13bc93bbfc5c73f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55cbccdabd50208ae533134a8c3dc036.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7005764e4f23a2a325b098369ed3c0bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a593d5e73349bd7406e7df7d008eeb37.png)
(3)已知正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94b10cf6a2c6ab08b402612abb3cb78b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c9b698aff3c8056d66163e0aed02c0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c33132a7eb57dce564b3a2ffc8a202a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
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【推荐2】在数学活动课上,老师准备了如图①所示的长为
,宽为
的长方形纸片(
).沿着长方形内部的虚线剪并得到4个形状、大小完全相同的小长方形,再按照图②拼成一个“回”字形大正方形.
,
,
之间的等量关系:____________.
(2)根据(1)中的结论,若
,
,则
____________;
(3)如图③,正方形
的边长为x,
,
,长方形
的面积为40,四边形
和四边形
均为正方形,求正方形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/878e89b6eca35e34c863e832a2c661db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18436f0e2391b0ab7537a566fc28204c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852e23a0022ffca4e65022de59697c15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d966d2f37a11dc6c1e6fbb411b588fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/283fa241e6eee0ebbfeb546eafc482f8.png)
(2)根据(1)中的结论,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289295fad0d1c11fc74470e8bb0c6be0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a655d6935ae3f646e17ff72bc213e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb2f87452a6a5fe9dd73766b16d66bf.png)
(3)如图③,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc5df62e8ac9c74a46462519b95479a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6f6c04bc017ced739230d14ba31948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f515246d9ee093bfbf9983fd47357d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93d66c83b58badd8c7465f41d8d64627.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a91ab22526a06d4a2a7d39c008a56c67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5223b83a9e753a415f7571f2aeb03a25.png)
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