[" 3.If "(1+i)(2+i)(3+i)cdots(n+i)=a+ib" ,show that,"],[2510cdots(n^(2)+1)=a^(2)+b^(2)]

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If (1+i)(2+i)(3+i)...(n+i)=a+ib show that, 2*5*10...(n^(2)+1)=a^(2)+b^(2).

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