若a,b互为相反数,c,d互为倒数,m的绝对值为4,求a+b-cd-3m的值.
更新时间:2021-12-17 20:40:21
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【推荐2】在数轴上表示有理数:1.5,﹣|﹣2|,0,﹣(﹣1),﹣
,并用“>”号将它们连接起来.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c8b45edad1f59a7454739675fd2de55.png)
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【推荐2】已知a、b互为相反数(a,b不为0),c、d互为倒数,
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b6f56532e27e244e6d847a2549aedf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c91d46089989f484d5722b950858085.png)
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【推荐2】已知:
为
的小数部分的倒数,且
,求下列代数式的值:
;
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30efdb9c7eb4b788352056f3edf21635.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8697ff4a2a718027ddb82530785893f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8c94dc8e3ab0bc8f85cbf4ab7a4c02c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a31ea441050ee8abec3f039a83306db0.png)
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【推荐1】已知多项式
,当
时,该多项式的值为
.
(1)求
的值;
(2)当
时,该多项式的值为
,求
的值;
(3)当
时,该多项式的值为
,求当
时,该多项式的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/017b130b031baa9740e4dd34f8dbb776.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a7df955fc17e92fd86302f8c34664a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13ce3ebd1112220c639562739f1f9d1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50866229ec5a3640fb250f9bd2192b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf3d3564c61e5e9c39a9e2cf2de048b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9355031ea0b2dc9cef3777621bc6d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e35f76e01c3979ae5987f7729f9856.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b27aee52676f4237adac068fe745fde.png)
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【推荐2】理解与思考:整体代换是数学的一种思想方法.例如:
若
,则
________;
我们将
作为一个整体代入,则原式
.
仿照上面的解题方法,完成下面的问题
(1)如果
,求
的值;
(2)若
,
,求
的值;
(3)当
时,代数式
的值为m,求当
时,代数式
的值(请用含有m的代数式表示).
若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d905b0b228d2ddb95cf128de5002eedc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56322be62651aceeee4ae11181ec7c47.png)
我们将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/749d0e03dc286f2a835768d4ac5f07a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2645dabaa5a0dac64740b7e58c514c8b.png)
仿照上面的解题方法,完成下面的问题
(1)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffef5fb614a2b2a033451b523a21ac3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e7393e5e6322d14e7f9034715865dc9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/503d81ca0114b58e8058a604b4124c58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c23a27e8d607478783e487a464a2aebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1e27ea4b8d0ad4462106da10f77180e.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e1c84057882768f20a01365c81b6760.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/543010b31d6ff869d1cad5adbb23c8b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/543010b31d6ff869d1cad5adbb23c8b8.png)
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