计算:
(1)
.
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bff6210d6c5d6ffb7043fc9ddab000.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c58502ba87a30ae1e3586017bdc82480.png)
21-22八年级下·浙江衢州·期末 查看更多[2]
更新时间:2022-08-21 20:42:55
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相似题推荐
解答题-计算题
|
适中
(0.65)
名校
【推荐1】观察下列一组等式,解答后面的问题:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6b98b229ca9ae991d2b533ad3dcd7f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bd771de7fd9e85d51186fce8e298240.png)
(1)化简:
______,
______(n为正整数)
(2)比较大小:
______
(填“
”,“
”或“
”)
(3)根据上面的结论,找规律,请直接写出下列算式的结果:
______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6b98b229ca9ae991d2b533ad3dcd7f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bd771de7fd9e85d51186fce8e298240.png)
(1)化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0be82b0549d78f021041daa0f1e514.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812831a8086d8908205f9c26e32f1dc7.png)
(2)比较大小:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72eb1230ce740b39de329a27a3245b8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764f77d6f477e6e7131352c90f2bcd76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
(3)根据上面的结论,找规律,请直接写出下列算式的结果:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d239fa0743f6f63567626a43375f927c.png)
您最近一年使用:0次
解答题-计算题
|
适中
(0.65)
名校
【推荐2】阅读下列材料:
,像
和
这样两个含有根式的代数式,它们的积不含根式,我们就说这两个代数式互为有理化因式,其中一个是另一个的有理化因式.
请运用上面的知识解决下列问题:
(1)指出
的有理化因式,并将
化简为分母中不含根式的式子;
(2)通过化简,比较
和
的大小关系;
(3)已知
,
.
①求a的值;
②结合①的结果,解方程:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67f1e88c3cd03ea64d787833395c49fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c43104fdaad6d05744e0898b4646656c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3052f5c5a80e405b2b65062497693a03.png)
请运用上面的知识解决下列问题:
(1)指出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bade5f8f4dac596776c6aa06162d90c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c8f780b5464253afd10db76fc27a5d0.png)
(2)通过化简,比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c8f780b5464253afd10db76fc27a5d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2cb6806f8ecd6a85f9f44b786fbe7bb.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0280e20519448e760b000934efaae930.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32dd8a1750a64de287cf073755a6480b.png)
①求a的值;
②结合①的结果,解方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0280e20519448e760b000934efaae930.png)
您最近一年使用:0次