Question

if sn the sum of first n terms of an ap is given by sn=3n2-4n then find its 12th term​

Answer 1

If Sn, the sum of first n terms of an A . P. is given by Sn = 3n2 – 4n, then find its nth term. ... ∴ n = 12. Hence, the number of terms is 12.

Answer 2

Answer:

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Step-by-step explanation:

P. is given by Sn = 3n2 – 4n,

then find its nth term.

Hence,

required nth term is 6n – 7. ... ∴ n = 12. Hence,

the number of terms is 12.