对任意一个两位数
,如果
等于两个正整数的平方和,那么称这个两位数
为“平方和数”,若
(
、
为正整数),记
.例如:
,
就是一个“平方和数”,则
.
(1)判断13是否是“平方和数”,若是,请计算
的值;若不是,请说明理由;
(2)若
是一个“平方和数”,
①设
,则
________;
②当
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d4e1bd7af466b721ba3be9b2e6b8c5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cc468619010a528aa4a8f6f35e965a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed396bc43fe805f6a7ff5f37c663f26e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d601a8e9eafdb33760fed9eee1151267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c92c4d1740583dc3a2c0302c5722811.png)
(1)判断13是否是“平方和数”,若是,请计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee5ecf02a8f7ed4e83704c62bfe7dc96.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e678bf0f4d5ddcafbe35f4b4c102b777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d8ea0c9c68731b8352def1f450d3af.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/508f754479c0b8de3a95b5240450da0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
更新时间:2024-04-03 09:20:05
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】对于平面直角坐标系xOy中的任意一点
,给出如下定义:记
,
,那么我们把点
与点
称为点P的一对“和谐点”.
例如,点
的一对“和谐点”是点
与点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2157b41548f02a86a438e63238719841.png)
(1)点
的一对“和谐点”坐标是______与______;
(2)若点
的一对“和谐点”重合,求y的值.
(3)若点C的一个“和谐点”坐标为
,求点C的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be8b157e196efc7332ea2a5b5a278d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5900a15285a93b64a6790c27b0515fc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d6bb01f1044358cc5fee441bc62489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7755620f26a4d0fe4dc772d891959188.png)
例如,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a42451bdbef6c82dbaf8e06f0614794.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76095b03d243fead89a6493614e4b68a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2157b41548f02a86a438e63238719841.png)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4403041c56520a96425c7e7ce786357.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4abca42b65ffadbefd32c634c3fb7c0.png)
(3)若点C的一个“和谐点”坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b830a83683b2c713cca7b70720549ec2.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】阅读下面的材料:
如果函数
满足:对于自变量
的取值范围内的任意
,
,
(1)若
,都有
,则称
是增函数;
(2)若
,都有
,则称
是减函数.
例题:证明函数
是减函数.
证明:设
,
.
∵
,∴
,
.∴
.即
.
∴
.∴函数
(
)是减函数.
根据以上材料,解答下面的问题:
已知函数
(
),
(1)计算:
_______,
_______;
(2)猜想:函数
(
)是_______函数(填“增”或“减”);
(3)请仿照例题证明你的猜想.
如果函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e2f24b4fa5308650a244d954f78f09b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca3ecbbaca8eeb1cfa8f4035f7d5726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
例题:证明函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db5d6842fae5b90f41edd0ebd2e3c3e.png)
证明:设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d41acc47493556617fe7b9e55093d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e5d4b24b9b4d23d6ab459ad14fe017.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d41acc47493556617fe7b9e55093d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dfc7ce4b23c259e1c286f215a0f0b7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b058f0a0ccb1440f02717234fda5664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e66a3108ff94bd8aa03f1d3241982d8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b80622137e1a28447b9e4c972c875868.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca3ecbbaca8eeb1cfa8f4035f7d5726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22c555fdd4ae6a1fb1a257fcc26b24be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
根据以上材料,解答下面的问题:
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0519192532883d560482ad071e7b54c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b857a8000d7e2998e6c7b05743504d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a5e0ebf92430345eba5bed50683dc20.png)
(2)猜想:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0519192532883d560482ad071e7b54c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
(3)请仿照例题证明你的猜想.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】我们把二次三项式
恒等变形为
(h、k为常数)的形式叫做配方.巧妙地运用配方法不仅可以将一个的多项式进行因式分解,也能求一个二次三项式的最值,还能结合非负数的意义来解决一些实际问题.例如,分解因式:
.
解:
.
请用配方法解答下列问题:
(1)分解因式:①
,②
;
(2)求多项式
的最小值;
(3)已知a、b、c是
的三边长,且满足
.判断
的形状.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c964e149ebd8bd5b2307f9b9e803caf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b2d30f0267c95acf93b056ee5a6162b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc8858c120c50b64f7071fc55316dd43.png)
解:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6b73ad16a22ed5625717c67a593dee.png)
请用配方法解答下列问题:
(1)分解因式:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/527ed5ec08bfac2d403309c2ee8256b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/634ceb63e326521ad8f3f2cac8a3eec3.png)
(2)求多项式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cae9e05eabece9f7dfece54b7421c3e9.png)
(3)已知a、b、c是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39cd417d54a0e0dee5bfb94bf1f5971f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次