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 04-05-2007 #1 mathhisfun Guest   Posts: n/a Need Help W/ Proof Prove that the left side: $1-\frac{1}{2^(^k^+^1^)}$ equals the right side: $1-\frac{1}{2^k}+\frac{1}{2^(^k^+^1)}$ * only changing the right side Last edited by mathhisfun; 04-05-2007 at 07:33 PM..