The sum of nth terms of an ap is 3n^2+5n,then find its nth term
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Answer:
Step-by-step explanation:
Sn =3n^2+5n
S1 =3+5= 8
a1 = 8
S2 = 12+10= 22
a2 = S2- S1 = 22- 8 = 14
d = a2- a1 = 14 - 8 = 6
an = a+(n- 1)d
= 8 +6n - 6
=2 + 6n##
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