Sir,b is comlex number,you are too...

Ai,...this kind of questions is too easy for me. I have teached math in U near 40 years...

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• Let's skip this...... though a little competition is good. Jing -亂彈- ♂ (0 bytes) () 07/17/2011 postreply 18:07:29

• (cont), maybe you can post some new problems. -亂彈- ♂ (0 bytes) () 07/17/2011 postreply 18:08:01

• yes, let's skip this...... it is becoming boring -15少- ♂ (0 bytes) () 07/18/2011 postreply 05:39:40