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8 s0 ?9 C3 d' S" c- f
So if want to compare these two numbers, it should compare there magnitude.www3.tvboxnow.com2 O3 k4 n; f8 @* Q1 R/ j% o
1. x -> 0+0itvb now,tvbnow,bttvb8 Q# i3 s+ ^9 a( R" ~# ]
2. y -> 0+1i
( _* A- P7 K0 d. _6 A0 K& _4 Gtvb now,tvbnow,bttvbtvb now,tvbnow,bttvb) {& T& e8 g$ |) D7 S
Magnitude of x is |√(0^2 +0^2)| = 0
! S2 b+ S8 w1 c- ^! Mtvb now,tvbnow,bttvbMagnitude of y is |√(0^2+1^2)| = 1; r( A2 ]: f8 l

; x3 g" [+ D9 r/ U3 Owww3.tvboxnow.comSo, the magnitude of y >x

rubykwok

其實唔知啱唔啱，我都係估吓估吓咋