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web2.0calc
 
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 I got \sqrt{1/4+r^2}?

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785
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avatar+1245 

Let r be a real number, |r| < 2, and let z be a complex number such that z+1z=r Find |z|.

 Apr 14, 2019

1+0 Answers

 #1
avatar+33654 
+2

Like so:

 

 Apr 14, 2019

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