warnar please chek my answer

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Questions

The following questions were asked by visitors named warnar please chek my answer.

the sum of n terms of an A.P. is 3n^2+2n, then find its n th term. answer-we know that tn=s(n)-s(n-1) =(3n^2+2n)-[3(n-1)^2+2(n-1)] =(3n^2+2n)-[3n^2-6n+3+2n-2] =3n^2+2n-[3n^2-6n+2n+3-2] =3n^2+2n-(3n^2-4n+1] =3n^2+2n-3n^2+4n-1 =6n-1 ans
8 years ago

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The following answers were posted by visitors named warnar please chek my answer.