7/2+7+21/2+....upto 17 terms
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Answer:
Sn = (n/2) [ 2a + (n - 1) d ]
S17 = (17/2) [ 7 + 16 x 7/2 ]
S17 = (17/2) [ 63 ] = 535½
KEEP SMILING .....
PLZ MARK AS BRAINLIST
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