Question

The 5th term of an AP is 11x-3y and the 11th term is 5x-4y. Find the 3rd term when the first term is 5

Answer 1

6d = (5x-4y)-(11x-3y) = -6x-y

2d = (-6x-y)/3
a3 = a5-2d = 11x-3y - (-6x-y)/3 = 13x - 8/3 y