As x is a pure real number, but y only with imaginary part.
7 B# N3 ?; q/ C1 I4 `/ A& g0 wSo if want to compare these two numbers, it should compare there magnitude.公仔箱論壇( Y4 r1 k! g; P/ J& `* \# F
1. x -> 0+0i
; P0 |$ r0 @& c2. y -> 0+1i
3 B3 J; d2 u1 @* z& h+ B' g9 C$ ntvb now,tvbnow,bttvb公仔箱論壇1 } G* u5 g) m+ `( q# w
Magnitude of x is |√(0^2 +0^2)| = 0
6 `$ c$ Q) C! k7 p公仔箱論壇Magnitude of y is |√(0^2+1^2)| = 1' X8 F: K- `9 }, Y I
公仔箱論壇# L8 W* S c9 k" K5 m8 ]6 B! k
So, the magnitude of y >x |
發表於 2012-12-29 07:13 PM
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