作者woosD (woos)
看板Math
标题[中学] 1的开根号
时间Tue Aug 9 18:10:46 2011
原文描述
So, the basic problem is to calculate the nth roots of one. Now, in the real
domain, of course, the answer is, sometimes there's only one of these, one
itself, and sometimes there are two, depending on whether n is an even number
or an odd number.
想请问当中 there are two的意思(?)
附图
n √(1)
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1F：→ hsnuyi :开n次方根 n为even时 答案可为两种(two) +1和-1 08/09 18:31
2F：→ hsnuyi :n为odd时 只有一种 1 (在实数系时) 08/09 18:32
3F：→ doublewhi :不过这种开根号定义一般是复数下用吧? 08/09 21:25