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7/2+7+21/2+....upto 17 terms​

Answer» SN = (n/2) [ 2a + (n - 1) d ]S17 = (17/2) [ 7 + 16 x 7/2 ]S17 = (17/2) [ 63 ] = 535½KEEP SMILING .....PLZ MARK AS BRAINLIST


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