If the first term of an A.P. is a and nth term is b, then its common difference is

Question

KollegeApply · Accepted Answer

Here, we are given the first term of the A.P. as a and the nth term (an) as b. So, let us take the common difference of the A.P. as d. Now, as we know, an = a + ( n-1) d On substituting the values given in the question, we get. b = a + ( n - 1) d ( n - 1) d = b - a d = b - a/n - 1 Therefore, d = b - a/n - 1

AChoose Your Answer