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If (a1 + ib1) (a2 + ib2) ..... (an + ibn) = A + iB

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If (a1 + ib1) (a2 + ib2) ..... (an + ibn) = A + iB, then (a21 + b21) + (a22 + b22) ..........(a2n + b2n)

(1) 1

(2) A2 + B2 

(3) (A + B)

(4) 1/A2 + 1/B2 

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(2) A2 + B2   

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