对于任意实数
、
约定关于
的一种运算如下:
.例如:
.
(1)
的值等于 ;
(2)若
满足
,求
的取值范围;
(3)若
,且
,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/36e16415b61722f9961e412386e6819f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db5737c6bb5f3fc93750a38e76db7b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98d5e63363922430cda15b01e560e202.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a8778abd176cbc7cc8de2b8d7239c36.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b908688f96bc208df090c48aebc13a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9c3938bd249045f850978aecb9de2d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b73c8bc728d963787e757c4b1e3e078c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
22-23七年级下·四川眉山·期中 查看更多[3]
四川省眉山市仁寿县满井镇兆嘉学校2022-2023学年七年级期中数学试题(已下线)综合复习与测试(4)挑战综合(压轴)题分类专题(专项练习)-2022-2023学年七年级数学下册基础知识专项讲练(人教版)山东省泰安市泰山区泰山区树人外国语学校(五四制)2022-2023学年七年级下学期第二次月考数学试题
更新时间:2023-04-30 14:27:44
|
相似题推荐
解答题-计算题
|
适中
(0.65)
【推荐1】规定运算*为:若
,则
,例如:
;若
,则
,例如
;若
,则
,例如
.
(1)计算
和
,并比较它们的大小;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bed0d3e6741e0193addff8cf7b25019c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd0e9fa52eeaa82fe4c19b0125c2d259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b9b9437a3e563c12a8e367a2dc1fcb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a9d8a8bb80447edc0541c9e7828f6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/960f11c12e1f6e3f58b4d09402efc8b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa0434edef64d358b669351d2976c91b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d60686ed0acc7504ee20a4f01b07fb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5c963585ee164b38eee60afb824f321.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ae4174b7bc4e3be7b56eb146b7a4b8.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/514c82b4befd9d722ea84e083e5ef2f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8908a1e4b8d81399067d3abe2af360a6.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2f6775a137c06548aeec78e597c7fb0.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】对
,
定义一种新运算
,规定:
(其中
,
均为非零常数),这里等式右边是通常的四则运算,例如:
,已知
,
.
(1)求
,
的值;
(2)若关于
的不等式组
恰好有2个整数解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fde1c25eab93383e53868d8a5a4b650a.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/5f1dc44b2749760f0c51577eab0a60a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76eeb2766bdbab4f1d2637e0eaf0596e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10867bdb34e88bad802206ed1799ef41.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac35d7a4329533366de9c4b1c27db755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
解答题-计算题
|
适中
(0.65)
【推荐2】定义一种新运算“
”,规定
,除新运算“
”外,其它运算完全按有理数和整式的运算进行.
(1)直接写出
的结果为_____________(用含a、b的代数式表示);
(2)化简:
;
(3)解方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e16415b61722f9961e412386e6819f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4466916ddc6e31caae39328a3662c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e16415b61722f9961e412386e6819f.png)
(1)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e238716334fdacd0f335e8a8e1ca187.png)
(2)化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edeadd2b46b7a15e176f0f24ecd356cc.png)
(3)解方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/249212b0abc12488ff00c857db7c7264.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐3】对于一个三位自然数;各数位上的数字互不相等且均不为0;若百位数字与个位数字的和与1的差等于十位数字;则称这个三位自然数为“和差一数”;若百位数字与个位数字和的两倍与1的差等于十位数字;则称这个三位自然数为“倍差一数”.例如:自然数463;满足各数位数字互不相等且均不为0;且
;所以463是“和差一数”;自然数392;满足各数位数字互不相等且均不为0;且
;所以392是“倍差一数”.
(1)请写出最小的“和差一数”为______;最大的“倍差一数”为______;
(2)若“和差一数”s的百位数字为3;“倍差一数”t的个位数字为1;且
能被7整除;请求出满足条件的s.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f97c63ed0cd50f859a8e8e07bf2de107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfeb8f92c266cc75324400d76af17df5.png)
(1)请写出最小的“和差一数”为______;最大的“倍差一数”为______;
(2)若“和差一数”s的百位数字为3;“倍差一数”t的个位数字为1;且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd300aec74c91ac86e43265abacc49ad.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】对
,
定义一种新运算
,规定:
(其中
,
均为非零常数),这里等式右边是通常的四则运算,例如:
,已知
,
.
(1)求
,
的值;
(2)若关于
的不等式组
恰好有2个整数解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fde1c25eab93383e53868d8a5a4b650a.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/5f1dc44b2749760f0c51577eab0a60a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76eeb2766bdbab4f1d2637e0eaf0596e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10867bdb34e88bad802206ed1799ef41.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac35d7a4329533366de9c4b1c27db755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知关于x、y的方程组
的解满足x≤0,y<0.
(1)用含m的代数式分别表示x和y;
(2)求m的取值范围;
(3)在m的取值范围内,当m为何整数时,不等式2mx+x<2m+1的解集为x>1?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae9ee4ec66b89cbb13542a5958d4e8fa.png)
(1)用含m的代数式分别表示x和y;
(2)求m的取值范围;
(3)在m的取值范围内,当m为何整数时,不等式2mx+x<2m+1的解集为x>1?
您最近一年使用:0次