As x is a pure real number, but y only with imaginary part./ N3 v6 R0 k4 Y! U1 S9 ^
So if want to compare these two numbers, it should compare there magnitude.
# C! P+ ?/ i r7 U5 L- a/ f# [1. x -> 0+0i
' ]* M& C* @: j. V1 C- K2. y -> 0+1i
: k. D7 M+ Q/ j! }" S" A7 p3 U# F公仔箱論壇
' X% S4 j2 M) v& T. |6 |9 B2 H Y5.39.217.76Magnitude of x is |√(0^2 +0^2)| = 0
2 ~, z6 Q8 {# a. `+ b; C# v( J* bMagnitude of y is |√(0^2+1^2)| = 1
/ o0 R& }* ^9 P7 j+ m& I, ftvb now,tvbnow,bttvb6 u! N7 K( L6 V9 h! l" i
So, the magnitude of y >x |
發表於 2012-12-29 07:13 PM
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