Question

If sum of first nth term of an A.P, be given by Sn =5n^2+3n then find its nth term.

Answer 1

SOLUTION

If An is the nth term of the given A.P., we get

=) An = Sn - Sn-1

=)An = (5n^2 +3n)- [5(n-1)^2 +3(n-1)]

=) (5n^2+3n)- (5n^2 -7n+2)

=) 10n-2, which is the required nth term of the given A.P.

hope it helps ✔️

Answer 2

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REFER TO THE ATTACHMENT

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