The sum of first n terms of A.P. is 5n-2n^{2}. Find the A.P. i.e., | Filo
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Class 11



Sequences and Series

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The sum of first terms of is . Find the i.e., and .

Solution: Given that the sum of first n terms an A.P is
First term,
Sum of first two terms ,
Second term ,
Common difference
term of an A.P
Therefore A.P is
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