ZiZhuJY 紫竹叽歪 | All posts tagged '立方根'

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对JavaScript的Math.pow()函数的一个修正

21 February 2012 Jeff JavaScript, Math 数学

一、问题： JavaScript的Math对象中有一个方法Math.pow(x, y)，用来求x的y次方。它有一个问题，即当x<0且y<1的时候，它总是返回NaN。对于x<0且1/y为偶数时，它返回NaN是有道理的，因为负数不能够被开偶数次方根。但是对于x<0且1/y为奇数时，返回NaN就没有道理了，因为负数也可以被开奇数次方根。即JavaScript的Math.po... [More]