Question

The first terms of an AP is 3, The last term is 83 and the sum of all its terms is 903. Find the number of terms and the common difference of the AP.

Answer 1

Answer:

21

Step-by-step explanation:

sum=903

n/2(a+l)= 902

n(3+83)= 903x2

86n=1806

n=1806/86

=21