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Find S_25 for -7+-2+3+8+.
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The series is in A.P. with first term, a= -7 and common difference, d= 5.
Sum of an A.P. upto the nth term is given by:
Plugging in the values, sum upto the 25th term is given by
Posted by llltkl on July 18, 2013 at 2:15 AM (Answer #1)
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