Write the expression for the common difference of an A.P. whose first term is a and nth term is b.

Question

Philoid · Accepted Answer

The n^th term of the A.P whose first term a₁ and common difference is d is given by

a_n = a + (n–1) d

Here a_n is given as b

so b = a + (n–1) d

= d

⇒ d=