先化简再求值:已知(x+
)2+|y+3|=0,求多项式3(x2﹣2xy)﹣[3x2﹣2y -2(xy+y)-17]的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
更新时间:2019-12-08 18:14:57
|
相似题推荐
解答题-计算题
|
适中
(0.65)
【推荐1】先化简,再求值:
(1)
,其中
.
(2)
,其中,
满足
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f6b09f042faba6be22a00a25583e6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39ca554b7565e7310a6f483bba82c78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd68a813f334b6606c6ebc2ae010287d.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】对非负实数x“四舍五入”到个位的值记为
,如
,
,根据你的理解完成以下问题:
(1)求
______,
______;
(2)若
,则实数x的最小整数是______,最大整数是______;
(3)已知
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2efc4b458ea20c1acca4317505e9fd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cedf029acacca6b9c16211f62a873210.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c533e0e6838860f545bcb721edb94f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5d0de3a0f58e60835a02191e5dd639d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b2a03824660309a1c46637251fd041.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a35ccc32aa3b95c885dbd1e08b65f721.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27d5e50bfc4286d889c75f8095722086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f86e346eef5b08a8a5f79f0665d3a6d.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】对于任意有理数
、
,如果满足
,那么称它们为“伴侣数对”,记为
.
(1)若
是“伴侣数对”,求
的值;
(2)若
是“伴侣数对”,求
的值.
![](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/7c5d470ed4c80bf06f309009885d00fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb34ff2628d84f03d350a8b91f814719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba7204f43679af6935e494c59d40c6ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3a4fb3faa63a71cf91c52766c8affc.png)
您最近一年使用:0次