Online Course Discussion Forum

4.20 Math II-B Algebra

 
 
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4.20 Math II-B Algebra
by Raymond luo - Saturday, 4 July 2020, 10:11 PM
 

For 4.20, I am not sure whether it means $z^2=z^{-2}$ or $z^2=\overline z^2$.

 
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Re: 4.20 Math II-B Algebra
by Areteem Professor - Monday, 6 July 2020, 2:49 PM
 

It should be the second, so $z^2 = \left(\overline{z}\right)^2$.