As x is a pure real number, but y only with imaginary part.7 x! z2 D9 H4 D, w& Z& |
So if want to compare these two numbers, it should compare there magnitude.
+ s3 K" U- A2 n# m4 x2 rtvb now,tvbnow,bttvb1. x -> 0+0i( }( S! T, _7 m/ }9 O# ^
2. y -> 0+1i公仔箱論壇4 Y" ?2 \9 P: C/ Q
+ z. M! A. X# stvb now,tvbnow,bttvbMagnitude of x is |√(0^2 +0^2)| = 0
5 N; ]/ x5 d r0 ?$ _9 Y' z% SMagnitude of y is |√(0^2+1^2)| = 1
2 Z( R$ ^& |* Itvb now,tvbnow,bttvb公仔箱論壇6 r9 G9 L: h; x+ N: B1 M8 i b( d; I
So, the magnitude of y >x |
發表於 2012-12-29 07:13 PM
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