Question

the seventeenth term of an ap exceeds with 13th term of ap by 15,then the common diference is

Answer 1

17th=13th+15
a+(n-1)×d=a+(n-1)×d+15
(n-1)×d=(n-1)×d+15
(17-1)×d=(13-1)d+15
16d=12d+15
4d=15
d=15÷4