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.公仔箱論壇  Q% J% w1 X+ G. f1 K
So if want to compare these two numbers, it should compare there magnitude.
  S6 c" {! i) [7 S1. x -> 0+0i
& @$ y, l! N2 }9 t% z2. y -> 0+1i公仔箱論壇; K( U/ j' Z# E( W7 e0 y

! y# q7 {" L. q# T& {tvb now,tvbnow,bttvbMagnitude of x is |√(0^2 +0^2)| = 0
/ B- }, o: ~' e5 g! t5 Ptvb now,tvbnow,bttvbMagnitude of y is |√(0^2+1^2)| = 1
1 a# }9 d, [, M- T5 _tvb now,tvbnow,bttvb
# V# Q, r4 D9 e; X+ E& C; f公仔箱論壇So, the magnitude of y >x

rubykwok

其實唔知啱唔啱，我都係估吓估吓咋