Question

In an A.P, the first term is $2$, the last term is $29$ and the sum of the terms is $155$. Find the common difference of the A.P.

Answer 1

By solving with the help of the equation
Sn=n/2(a+l)
We get n=10
Puting the value in
Tn=a+(n-1)d
By solving this equation
We get d=3