Question

Find the middle term of an AP 6,13,20,...,216​

Answer 1

Step-by-step explanation:

Here,a=6

d=7

an=216

an=a+(n-1)d

216=6+(n-1)7

210/7=n-1

30+1=n

n=31

middle term is

=31+1 /2

=16

middle term is

=6+15*7

=6+105

=111

Answer 2

Answer:

refer the above attachment.Hope it helps u.