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Doubt

regarding this conclusion  i have doubt "Required function  = W x Wconjugate = |W|2"

when w is in form of  (1 ir)
then |W| = |1 ir|

and |W|^2 = |1 ir|^2
                 = 1 2 * 1 * ir ir^2
                 = 1 2*ir - r^2

so how it will be equal to (1 r^2)  = |W|^2
thnks

Answer Explanation

|W| = (1+r2)1/2

|W|2 = 1+r2


          = (1+ir)(1-ir) = WxWconjugate

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