Question

If sum to n terms of a series is given by n+8 then its 2nd term is

Answer 1

sn= n+8
so, puttingn=1
which gives-----
s1= 1+8
which gives----'-
a=9
again putting n=2
which gives-----
s2=2+8
or, a+a2=10
or, 9+a2=10
or, a2=1 Hence found