Question

Write the first four terms of the A.P. when the first term a and the common difference d are given.

a = 5, d = 2

Answer 1

Compute the first four terms with a = 5 and d = 2:

a_n = a + (n − 1)d.

a₁ = a = 5

a₂ = a + d

= 5 + 2

= 7

a₃ = a + 2d

= 5 + 2 × 2

= 9

a₄ = a + 3d

= 5 + 3 × 2

= 11

5, 7, 9, 11