我想問下-1的開方是甚麼?
回答 (8)
2006-10-30 9:22 pm
✔ 最佳答案
負1的開方=1i
2006-10-30 13:27:27 補充：
(開方-1)是一個虛數虛數中:開方-1用 i 來表示
2006-10-30 13:29:18 補充：
開方-1= i
2006-11-03 7:26 pm
Let f(x) = sqrt(-1)
If you define the above function is real number to real number, then sqrt(-1) is no such real number.
But if you define the above function is complex number to complex number, then sqrt(-1) is i (which is a definition, where i^2 = -1)
If you define the above function is real number to real number, then sqrt(-1) is no such real number.
But if you define the above function is complex number to complex number, then sqrt(-1) is i (which is a definition, where i^2 = -1)
參考: myself, A Maths textbook (I am in the old syllabus)
2006-11-01 1:02 am
|-1| or |1| = 1
(-1)^2 = 1
|-1|^2 = 1
So, |-1| = 1 的開方
Because |某一個數|=正數
Then, |-1|=|1|
|-1|的開方=|1|的開方=1
But, 負數的開方是冇可能等於任何數值...
So, we can prove that -1的開方=unknown
|-1|的開方才可計出 答案=1
(-1)^2 = 1
|-1|^2 = 1
So, |-1| = 1 的開方
Because |某一個數|=正數
Then, |-1|=|1|
|-1|的開方=|1|的開方=1
But, 負數的開方是冇可能等於任何數值...
So, we can prove that -1的開方=unknown
|-1|的開方才可計出 答案=1
2006-10-31 3:25 am
負1的開方是一個虛數
虛數中:
開方負數用 i 來表示
2i, 3i,4i, 5i,6i......
-2,-3,-4,-5, -6......the same(虛數)
虛數中:
開方負數用 i 來表示
2i, 3i,4i, 5i,6i......
-2,-3,-4,-5, -6......the same(虛數)
參考: me
2006-10-30 9:16 pm
Error
2006-10-30 9:09 pm
你試下用計數機計,會出maths.error
但答案是(開方-1)
(開方-1)是一個虛數
e.g(開方-1)*(開方-1)=-1
2006-10-30 13:10:32 補充：
樓上個位,1*1不等如-1~~
但答案是(開方-1)
(開方-1)是一個虛數
e.g(開方-1)*(開方-1)=-1
2006-10-30 13:10:32 補充：
樓上個位,1*1不等如-1~~
參考: 自己
2006-10-30 9:07 pm
- 1的開方是1
收錄日期: 2021-04-13 19:20:21
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061030000051KK02063