Question

is 68 a term 0f ap7,10,13....?

Answer 1

68 is not a team of AP7,10,13,..........?

Answer 2

a=7
d=3
An=68
An=a+(n-1)d
68 =7+(n-1)3
68 =7+3n-3
68=4+3n
3n=68-4
3n=64
n=64/3
n can't be (-)ve.
So 68 is not a term of the given Ap.