If sum of n terms of an A.P. is n^2+5n then find general term.(a) n+1(b) 2n(c) 3n(d) n^2+3nI had been asked this question in an internship interview.My enquiry is from Arithmetic Progression(A.P.) topic in chapter Sequences and Series of Mathematics – Class 11

If sum of n terms of an A.P. is n^2+5n then find general term.(a) n+1(

1.	If sum of n terms of an A.P. is n^2+5n then find general term.(a) n+1(b) 2n(c) 3n(d) n^2+3nI had been asked this question in an internship interview.My enquiry is from Arithmetic Progression(A.P.) topic in chapter Sequences and Series of Mathematics – Class 11
Answer» The correct option is (B) 2N The explanation is: GIVEN, Sn = n^2+5n We KNOW, an = Sn– Sn-1 = (n^2+5n) – ((n-1)^2+5(n-1)) = (n^2+5n) – (n^2+1-2n+5n-1) = 2n.

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If sum of n terms of an A.P. is n^2+5n then find general term.(a) n+1(b) 2n(c) 3n(d) n^2+3nI had been asked this question in an internship interview.My enquiry is from Arithmetic Progression(A.P.) topic in chapter Sequences and Series of Mathematics – Class 11

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