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圆周率是超越数,不能满足任何整系数代数方程的实数,圆周率π=3.1415926535…,自然对数的底e=2.718281828…可以证明超越数有无穷个。圆周率不是代数数的数,它超越代数方法所及的范围之外。
圆周率的起源:
最先得出π≈3.14的是希腊的阿基米德(约公元前240年),最先给出π小数后面四位准确值的是希腊人托勒密(约公元前150年),最早算出π小数后七位准确值的是我国的祖冲之,1610年荷兰籍德数学家鲁道夫应用内接和外切正多边形计算π值,通过2边形计算π到35位小数,1630年格林贝格利用斯涅耳的改进方法计算π值到39位小数,这是利用古典方法计算π值的最重要尝试。

扩展资料
性质:
圆周率(Pi)是圆的周长与直径的比值,一般用希腊字母π表示,是一个在数学及物理学中普遍存在的数学常数。π也等于圆形之面积与半径平方之比。是精确计算圆周长、圆面积、球体积等几何形状的关键值。 在分析学里,π可以严格地定义为满足sinx = 0的最小正实数x。
圆周率用希腊字母 π(读作pài)表示,是一个常数(约等于3.141592654),是代表圆周长和直径的比值。它是一个无理数,即无限不循环小数。
通常都用3.14代表圆周率去进行近似计算。而用十位小数3.141592654便足以应付一般计算。即使是工程师或物理学家要进行较精密的计算,充其量也只需取值至小数点后几百个位。
参考资料来源:百度百科——圆周率
圆周率是个无限不循环小数,在现在计算机发达的时代,其实背到多少位没有太大实际意义,现在大多数是用来锻炼记忆力,的测试而已
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圆周率100位可以这样速记zz- -
背景:"我"作为一个父亲,对于儿子的堕落,由自暴自弃到想法挽救,最后成功,和
家团圆......
方法:读音+形状......
白话+古文......
(儿子十分堕落)
山颠一寺一壶酒,3.14159
儿乐,苦煞吾。26 535
把酒吃,酒杀儿。897 932
杀不死,乐而乐。384 626
(父亲对儿子放弃希望)
死了算罢了,儿弃沟 43383 279
吾痛儿,白白死已够戚矣,留给山沟沟 502 8841971 69399(这句是我觉得最强的!)
(心疼儿子)
山拐吾腰痛,吾怕儿冻久,凄事久思思。37510 58209 74944
(接下来开始挽救儿子了......)
吾救儿,山洞拐,不宜留 592 307 816
四邻乐,儿不乐,儿疼爸久久 406 286 20899
爸乐儿不懂,"三思吧!" 86280 348
儿悟,三思而依矣,妻懂乐其久...... 25 34211 70679
一百位over......
圆周率(Pi)是圆的周长与直径的比值,一般用希腊字母π表示,是一个在数学及物理学中普遍存在的数学常数。π也等于圆形之面积与半径平方之比。是精确计算圆周长、圆面积、球体积等几何形状的关键值。 在分析学里,π可以严格地定义为满足sinx = 0的最小正实数x。
圆周率用希腊字母 π(读作pài)表示,是一个常数(约等于3.141592654),是代表圆周长和直径的比值。它是一个无理数,即无限不循环小数。
通常都用3.14代表圆周率去进行近似计算。而用十位小数3.141592654便足以应付一般计算。即使是工程师或物理学家要进行较精密的计算,充其量也只需取值至小数点后几百个位。
按照什么方法来背?
总不可能就当背电话号码一样背吧。
它怎样算值的?
背下来是做什么的?
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