Question

Which term comes after AP 4,9,14,19,......... is 109

Answer 1

Let the first term be a=4
And c.d. be d=5
Let n be the reqd term
nth term=a +(n-1)d
109=4+(n-1)5
5n-5=105
5n=110
n=22nd term is the ans

Answer 2

$term = a + (n - 1) \times r$
a=4
r=9-4=14-9=5
term=109
n=?
n=22