How many terms of the A.P. 16, 14, 12,... are needed to give the sum 60? Explain
why do we get two answers.
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16 , 14 , 12 ,..a=16 , d = -2 , Sn = 60 , n=? Its has 2 solutions because sum of 60 will comes till 20 terms or till 3 terms.
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