if the the sum of the 1st n terms of an ap iS given by sn=5n² + 3n. find its nth term

if the the sum of the 1st n terms of an ap iS given by sn=5n² + 3n. f

1.	if the the sum of the 1st n terms of an ap iS given by sn=5n² + 3n. find its nth term
Answer» S1=5×1×1+3×1 =8a1=8S2=5×2×2+3×2 =26a1+a2=268+a2=26a2=18d=a2-a1 =18-8d =10an=a+(n-1)d =8+(n-1)10 =8+10n-10 an=10n-2