Question

find the middle term of the ap -11,-7,-3 ......45

Answer 1

Answer:

given-

a = -11

d = second term - first term

   = -7+11

    =4

and an= 45

by the formula of an=a +(n-1)d

=> 45 = - 11 + (n-1)4

=>45+11 = (n-1)4

=> 56 = (n-1)4

=> 56/4 = n-1

=> 14 = n-1

=> n = 14+1 = 15

therefore the middle term of the ap= n/2

=15/2

= 7.5

hope it will help to you