1.

For any integer k, if ak=cos(kπ7)+isin(kπ7), then value of the expression 12∑k=1|ak+1−ak|3∑k=1|a4k−1−a4k−2| is

Answer» For any integer k, if ak=cos(kπ7)+isin(kπ7), then value of the expression 12k=1|ak+1ak|3k=1|a4k1a4k2| is


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