Question

Find the middle term of A.P 7, 13, 19, ……, 247.​

Answer 1

Answer: The middle term of the series is 127

Step-by-step explanation:

Given arithmetic series,7, 13, 19, ……, 247

We using the below formula to find the middle term,$Total term(n)=\frac{last term-first term}{d}+1$

=$\frac{247-7}{6} +1$

=(240/6)+1

=40+1

=41

Odd series middle term(n+1)/2=(41+1)/2=42/2=21

First term=7

Common difference=6

an=f+(n-1)d

=7+(21-1)6

=127

The middle term of the series is 127