If the sum of first n terms of an ap is given by sn=2n²+n . Find its

1.	If the sum of first n terms of an ap is given by sn=2n²+n . Find its nth term
Answer» Put the value of n as 1 Then,Sn =3Then same as2,3 a=sn=1a2=S2-S1 and so onThen find the ap and find nth term by formula,an=a+(n-1)dHope this may help u

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