1.

Let the sequence a1,a2,a3.....an form an A.P. Then a21−a22+a23−a24+.....+a22n−1−a22n is equal to

Answer»

Let the sequence a1,a2,a3.....an form an A.P. Then
a21a22+a23a24+.....+a22n1a22n is equal to




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