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October 23rd, 2016, 07:29 PM  #1 
Member Joined: Sep 2016 From: zambia Posts: 31 Thanks: 0  sets of numbers (complex numbers)
Show that (1+i/1i)^4k=1 if k is a positive integer 
October 23rd, 2016, 07:52 PM  #2 
Senior Member Joined: Sep 2015 From: USA Posts: 1,975 Thanks: 1026 
is this supposed to be $\left(\dfrac{1+i}{1i}\right)^{4k}$ or $\left(1+\dfrac{i}{1i}\right)^{4k}$ or possibly $\left(1 + \dfrac {i}{1} i\right)^{4k}$ 
October 23rd, 2016, 08:55 PM  #3 
Senior Member Joined: Sep 2015 From: USA Posts: 1,975 Thanks: 1026  

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complex, numbers, sets 
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