Question

If first term of ap is a and last term is b find common difference

Answer 1

Here, A is first term of the A.P.

And B is last term.

I hope you are aware of Common difference, It's the difference between two consecutive terms of an A.P.

We know that,

An (Last term) = A + (n-1) d

After putting values, we get,

B = A + (n-1) d
B - A = (n-1) d

(B-A)/n-1 = d

Hence the common difference is B-A/n-1