探索研究:
(1) 比较下列各式的大小 (用“<”或“>”或“=”连接)
①
+
; ②
+
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05524a36ed26b65b2ed5ff47dd73fa4d.png)
③
+
. ④
+
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/debf10cc2d717a08077109b4617017f7.png)
(2) 通过以上比较,请你分析、归纳出当a、b为有理数时,
+
与
的大小关系.(直接写出结论即可)
(3)根据(2)中得出的结论,当
+2015=
时,则x的取值范围是 .
如
+
=15,
=5,则a1+a2= .
(1) 比较下列各式的大小 (用“<”或“>”或“=”连接)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c7b4a6f6c7c676d569dfd0658b2b6e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f89c0a81dd1413d04f450a5f51348d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/928e6768882cb34775f72fc0bca684d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8c81269931812763651a7c6be0227ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fba75311e1e5fcf7693a50ef7168ca9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05524a36ed26b65b2ed5ff47dd73fa4d.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/273327f401c5da112bc5904117d05c4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1f9f82b39cc1adf62725a51d4b735fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f15076aec21e151e7e017340a71dce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8db0823f30ff7c5431cb5ec1529b540.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbf1b72daaa518b71a7199054c1de7f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/debf10cc2d717a08077109b4617017f7.png)
(2) 通过以上比较,请你分析、归纳出当a、b为有理数时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8d40e257f9c446b8e30fa841b74bbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce22731a412796fe2925e01f765d5976.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b33ceacb7836ccd98815e08a20cd2be.png)
(3)根据(2)中得出的结论,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dc51e97939a8966daa015535a801561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5f825b4c0c4d5a646bdc19ed1dee9a.png)
如
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ebde44284dc883effb39ed2812ace97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b74ceec102755cd8ee80ad18a9791dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f9abb27f6d5dbcc2acb60ec026e66e2.png)
16-17七年级上·江苏盐城·期中 查看更多[5]
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更新时间:2017-09-10 06:37:54
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