Question

find 16th term of AP 7,11,15,19

Answer 1

a=7 d=4 
a16= a+(n-1)d
7+(16-1)4
=7+(15)4
=7+60
=67

67 is the 16th term of this AP

Answer 2

a=7
d=4
$a_{16}$=a+(n-1)d
                         =7+15(4)
                         =7+60
                         =67