English Version:" n' o% I2 ?$ [2 B0 }; Q3 w
if X = 0 , Y = i , i= √(-1) - m- O. a7 V2 q- \公仔箱論壇 √ means squareroot,1 R# _, Z" Z7 x) j) E
which of the following statement is true, # [) J2 R& l) J7 O0 A9 V
a)X>Y * c) [1 w9 v1 d$ E) N; I5.39.217.77b)X=Y 6 d T6 ?) ]. z7 v3 ec)X<Ytvb now,tvbnow,bttvb" ^/ C8 z! m' q+ `
d)X=∈tvb now,tvbnow,bttvb4 d$ l% a9 J! e
e)None of the above t& I* T4 Y9 c( O1 a: W/ N公仔箱論壇Explain Why you choose that answer5.39.217.77- q# K) ]0 ?( l; i$ U! F$ x
Please supported with at least one explanation. & R5 n3 q! I+ e公仔箱論壇* `3 M# V, e; S8 G" n( z# `
9 M T. ?1 N0 A5 P' [6 Y! g; hTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。若0只代表实数,i是虚数 / ~2 B+ o( _! q$ ~5 ?( D8 ~! e5 N! |两者不具备可比性作者: samtsirhc 時間: 2009-2-16 02:36 PM
good answer % I% L3 n- S% \3 R/ j" M/ Mi love it作者: dr3jai 時間: 2009-2-17 01:32 PM
I think is X>Y作者: ongoky 時間: 2009-2-17 01:56 PM
The Answer is E, There is no answer for Square root of negative Number作者: alanma 時間: 2009-2-17 06:27 PM
作者: yinyinyin1234 時間: 2009-2-17 07:49 PM
see answer作者: 域琪 時間: 2009-2-20 12:31 AM
呵呵~我唔識呀作者: kangchuyi 時間: 2009-3-23 01:35 AM
thank作者: haha28 時間: 2009-5-5 09:18 PM
thanks作者: bb6633 時間: 2010-12-6 01:16 PM
Thanks for sharing作者: felix9981 時間: 2010-12-16 01:36 PM
呵呵~我唔識呀作者: bluekid2030 時間: 2012-12-28 12:44 PM
難題作者: sai2236534 時間: 2012-12-29 07:13 PM
真是超級簡單作者: maninfat 時間: 2013-1-1 10:27 AM
e)None of the above作者: rubykwok 時間: 2013-1-6 06:17 PM
As x is a pure real number, but y only with imaginary part. # B7 {: N! j, t1 p. w( `5.39.217.77So if want to compare these two numbers, it should compare there magnitude. 3 ]. b9 w; r8 g* O: m4 @7 M- i' Q. [3 F4 C5.39.217.771. x -> 0+0i 8 s! d7 R7 [ m, B* `tvb now,tvbnow,bttvb2. y -> 0+1i6 U- w' A* S, m; U( ?9 s
* r5 \# ?. A0 M. d ^
Magnitude of x is |√(0^2 +0^2)| = 0' x' L& _6 B3 X; ?5 R' ^
Magnitude of y is |√(0^2+1^2)| = 1 # Y- _/ {3 V; [* G6 g7 h3 V3 w6 ^- [3 ztvb now,tvbnow,bttvb公仔箱論壇6 ]% _* h7 f, ?" J2 L2 y
So, the magnitude of y >x作者: rubykwok 時間: 2013-1-6 06:50 PM