[中學] 1的開根號

看板Math作者 (woos)時間13年前 (2011/08/09 18:10), 編輯推噓0(003)
留言3則, 2人參與, 最新討論串1/1
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. 想請問當中 there are two的意思(?) 附圖 n √(1) -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 122.117.34.8

08/09 18:31, , 1F
開n次方根 n為even時 答案可為兩種(two) +1和-1
08/09 18:31, 1F

08/09 18:32, , 2F
n為odd時 只有一種 1 (在實數系時)
08/09 18:32, 2F

08/09 21:25, , 3F
不過這種開根號定義一般是複數下用吧?
08/09 21:25, 3F
文章代碼(AID): #1EGGUe8B (Math)