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March 27th, 2013, 07:53 AM  #1 
Senior Member Joined: Feb 2013 Posts: 114 Thanks: 0  complex number  modulus problem
If where and are non zero complex numbers, then which one is correct (a) Re (b) Im (c) Can we take and Now .......(i) Also ....(ii) Since (i) = (ii) After solving these two equation i get : 4ax +4by=0 .....(iii) What to do next ? could you please guide.... 
March 27th, 2013, 11:15 AM  #2 
Senior Member Joined: Mar 2012 From: Belgium Posts: 654 Thanks: 11  Re: complex number  modulus problem
the correct answer is a. calculate z1/z2 and you get you just proved that so Re(z1/z2)=0 

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