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[" 1If "(1+i)^(2n)+(1-i)^(2n)=-2^(n+1)" ...

[" 1If "(1+i)^(2n)+(1-i)^(2n)=-2^(n+1)" (where,"i=sqrt(-1)" ) for all those "n" ,which are "],[[" (a) even "," (b) odd "],[" (c) multiple of 3"," (d) None of these "]]

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