Question

Find the middle most term of the AP -11,-7,-3........49​

Answer 1

Step-by-step explanation:

1st term of the series is -11

common difference is -7-(-11)= -7+11=4

let series have n terms

-11+(n-1).4=49

-11+4n-4=49

4n=49+15=64

n=16

series have 16 terms

7th and 8th terms are middle

7th term is -11+(7-1).4=-11+24=13

8th term is -11+(8-1).4= -11+28=17