sai2236534

真是超級簡單

maninfat

e)None of the above

rubykwok

As x is a pure real number, but y only with imaginary part.! s' P0 g1 d/ W5 m
So if want to compare these two numbers, it should compare there magnitude.* N, l( E0 o( q; G6 i- k
1. x -> 0+0i
! N. L% i8 b$ H6 d: i; otvb now,tvbnow,bttvb2. y -> 0+1i! p7 _) a8 A) W' a* ]' s8 j; |5 x' N

" }2 \: _2 t; q/ i5.39.217.76Magnitude of x is |√(0^2 +0^2)| = 0tvb now,tvbnow,bttvb* A- E; C! q3 J8 ^' w
Magnitude of y is |√(0^2+1^2)| = 1
% L5 C+ f( ~' O# L& \公仔箱論壇
$ M$ B$ y6 N7 w  S; htvb now,tvbnow,bttvbSo, the magnitude of y >x

rubykwok

其實唔知啱唔啱，我都係估吓估吓咋