我国古代数学名著《九章算术》中割圆术有:“割之弥细,所失弥少,割之又割,以至于不可割,则与圆周合体而无所失矣.”其体现的是一种无限与有限的转化过程,比如在![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b30e8d5924b797386d18965cf07e10.png)
中“
”即代表无限次重复,但原式却是个定值x. 这可以通过方程
确定x=2,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9605d3b9b5b7fae01e2233fb6dda7efb.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b30e8d5924b797386d18965cf07e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b11259116e7bc1ef5051e13f75afbc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52d182e17c108bb67afede31e7e83ed1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9605d3b9b5b7fae01e2233fb6dda7efb.png)
18-19高二上·云南玉溪·期末 查看更多[2]
更新时间:2019-02-14 13:15:25
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【知识点】 类比推理
相似题推荐
填空题-单空题
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适中
(0.65)
【推荐1】给出下面类比推理(其中
为有理数集,
为实数集,
为复数集):
①“若
,则
”类比推出“
,则
”;
②“若
,则复数
”类比推出“
,则
”;
③“
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481ee0d1e39e92a4732eea90225eb94c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef73aff3fe470e367f4af24fdfff3df.png)
”类比推出“若
,则
”;
④“若
,则
”类比推出“若
,则
”.
其中类比结论正确的个数为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
①“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773ca22fc12ade9e60dbc749ba5cfa73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df72df862b00830a5d07b804fee9c420.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e86d18b56984188a9c5da8d8eb4ea65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9486b2731e42d0500b8df4394b5ae664.png)
②“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ac12138178cb539a9e1c8f77587038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0bfd40a0c55243257fd1bbe3a858e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/343b7ba728f9b123b34a8f0ba4aa0c08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01465ecc2741cc4573fe2121bbbda0d2.png)
③“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773ca22fc12ade9e60dbc749ba5cfa73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481ee0d1e39e92a4732eea90225eb94c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef73aff3fe470e367f4af24fdfff3df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2130dfd8a7f257cd858d55f01c2a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d31a5c00e830688badb6d91630b72a.png)
④“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa145f790b80ed7e2ffba138122e5251.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/255483db09b1e523a4fcc1f618b98ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2044d71fa3e78f8c9fa65291efa85bc.png)
其中类比结论正确的个数为
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真题
【推荐2】半径为r的圆的面积s(r)=
,周长c(r)=2
,若将r看作
上的变量,则
=2
①式可用文字语言叙述为,圆的面积函数的导数等于圆的周长函数;对于半径为R的球,若将R看作
上的变量,请你写出类似于①的式子________________ .②该式可用文字语言叙述为_____________________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc6ecf80fbebb59bed43ae240050c63d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f9019913315e30f5e6e09872815472.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e90ce7a3f39df9ac05ed7f7a586fb433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f9019913315e30f5e6e09872815472.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
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