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Question
Write the nth term of an A.P. the sum of whose n terms is Sn.
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Solution
We are given an A.P. the sum of whose n terms is Sn. So, to calculate the nth term of the A.P. we use following formula,
an = Sn - Sn-1
So, the nth term of the A.P. is given by an = Sn - Sn-1 .
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