Question

the first term of an AP is 5 ,the last is 45 and the sum is 125 .Find the number of terms?​

Answer 1

Hope it helps!

Thanks for asking.

Answer 2

Step-by-step explanation:

sum of terms in A.P =n/2(first term +last term)

where n is no of terms in A.P

125=n/2(5+45)

125=25n

n=125/25

n=5

so no of terms in A.P are 5