As x is a pure real number, but y only with imaginary part.公仔箱論壇% I5 r9 E9 m* Q- s9 {# ]2 S1 x
So if want to compare these two numbers, it should compare there magnitude.公仔箱論壇+ I( A2 M R2 J J$ J0 g- B
1. x -> 0+0i
: ~; V# k4 e, v" ?2. y -> 0+1i6 W1 _. G& A+ S1 W
( s8 V9 ?/ ]/ }. p+ V
Magnitude of x is |√(0^2 +0^2)| = 0tvb now,tvbnow,bttvb" A$ y7 Z" [" O% ?; ^' Z# o
Magnitude of y is |√(0^2+1^2)| = 1公仔箱論壇; p0 \) w9 _# g- a
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So, the magnitude of y >x |
發表於 2013-1-6 06:17 PM
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