Question

Find the middle term of AP 9, 15, 21 ,27,....183

Answer 1

Answer:

here, a= 9 . d = 6 . l = 183

Tn = 183

a+(n-1)d = 183

9 + (n-1)6 = 183

(n-1) = 183 - 9 / 6

= 174/6

= 29

n = 29 +1

= 30

so, middle term = 30/2

= 15