题型:解答题-问答题
难度:0.65
引用次数:125
题号:22335671
定义:对于任意实数
,
,如果满足
,那么称
,
互为“美好数”,点
为“美好点”.
(1)下列命题:①若点
为“美好点”,则点
也一定为“美好点”;②存在与1互为“美好数”的数;③若点a与b互为相反数,则
一定不是“美好点”.其中真命题是_______(填序号)
(2)若
为“美好点”,求a的值.
(3)已知x,y是二元一次方程组
的解,请判断点
是否为“美好点”?若是,请求m的值;若不是,请说明理由.
![](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/132bc768c61ab195768601a0be02222a.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/30277e0be448b4955903e81e8795e45d.png)
(1)下列命题:①若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef333f78ed0adf43fea544f05ffddef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55663f98e1efea0f574d30388df9d1fd.png)
(3)已知x,y是二元一次方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173e8d2b29c305d3f68839698c0ae792.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
更新时间:2024-04-03 16:42:12
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【推荐1】阅读以下材料:
我们规定:若有理数
,
满足
,则称
,
互为“等和积数”,其中
叫做
的“等和积数”,
也叫
的“等和积数”.例如:因为
,
,所以
,则
与
互为“等和积数”.
请根据上述规定解答下列问题:
(1)有理数3的“等和积数”是______;
(2)“等和积数”等于它本身的有理数是______;
(3)若
与
互为“等和积数”,
与
互为“等和积数”,求
的值.
我们规定:若有理数
![](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/132bc768c61ab195768601a0be02222a.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9983810765f109f84d1e9b0194b89ada.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fff6fd6c0790f74ec29bb2ef7b28e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c9ff2f98b0a1e5fa6bae26b948c6c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
请根据上述规定解答下列问题:
(1)有理数3的“等和积数”是______;
(2)“等和积数”等于它本身的有理数是______;
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33adb74906403b0b00fcbd9fa691d8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2008b78a906cf5ecdfd68432fa9ad1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ae91b63af429ad1d48613dec84ab29d.png)
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解答题-问答题
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适中
(0.65)
【推荐2】已知关于
的方程
,研究
存在的条件,对这个方程的解进行讨论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a3f02e7b085abcde5436b48abd234d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
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(0.65)
【推荐1】已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fd04a0d5d101b6c806bc3381b1bfcc.png)
(1)求
的值;
(2)若
恰好是一元二次方程
的两个根,求p,q的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fd04a0d5d101b6c806bc3381b1bfcc.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
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解答题-问答题
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适中
(0.65)
【推荐1】判断下列命题的真假,是假命题的举出反例.
①两个锐角的和是钝角;
②一个角的补角大于这个角;
③不相等的角不是对顶角.
①两个锐角的和是钝角;
②一个角的补角大于这个角;
③不相等的角不是对顶角.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】写出下列命题的逆命题,并判断逆命题是真命题,还是假命题.
(1)两直线平行,同位角相等
(2)如果两个数相等,那么这两个数的绝对值相等.
(1)两直线平行,同位角相等
(2)如果两个数相等,那么这两个数的绝对值相等.
您最近一年使用:0次