Question

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

a = −4, d = −1

Answer 1

Given: a = −4 and d = −1

a_n = a + (n − 1)d.

a₁ = a = −4

a₂ = a + d

= −4 + (−1)

= −5

a₃ = a + 2d

= −4 + 2(−1)

= −6

a₄ = a + 3d

= −4 + 3(−1)

= −7

Therefore, the first four terms are: −4, −5, −6, −7.