Question

if the common difference of two AP is 5,then what will be the difference of a18-a13​

Answer 1

Answer:

a18 = a + (18 -1)d = a + 17d

a13 = a + (13 -1)d = a + 12d

a18 - a13 = a + 17d - ( a + 12d) = a + 17d - a - 12d = 5d

Here given that common difference d = 5

so , a18 - a13 = 5d = 5×5= 25

Answer 2

Answer:

d=5

a(18)=a+(18-1)5=a+85

a(13)=a+(13-1)5=a+60

a(18)-a(13)=a+85-a-60=25

.....xd.......