Question

if a=7,d=6then t 19=___​

Answer 1

Answer:

It is given that,

d=5

Now,

t

n

=a+(n−1)d

t

18

−t

13

=(a+(18−1)d)−(a+(13−1)d)

(a+17d)−(a+12d)

=5d

=5(5)

=25