Question

Write an expression for the most apparent nth term of the sequence. (Assume that n begins with 1)
5,7,9,11,13,15,19,.....

Answer 1

n=1 f(1) = 5
n=2 f(2) = 7
difference is 2

so

f(n) = 5 + (n-1)( 2)

f(n) increases by 2 from 5 on up.

Answer 2

Thanks for your help!