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October 26th, 2016, 10:39 AM  #1 
Member Joined: Sep 2016 From: zambia Posts: 31 Thanks: 0  Complex numbers
Given that z+1/z=k,where k is real number. Prove that either z is real or z=1 
October 26th, 2016, 10:42 AM  #2 
Senior Member Joined: Sep 2015 From: USA Posts: 2,529 Thanks: 1389 
you need to start showing your work on these questions.

October 26th, 2016, 12:12 PM  #3 
Math Team Joined: May 2013 From: The Astral plane Posts: 2,257 Thanks: 928 Math Focus: Wibbly wobbly timeywimey stuff.  

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