Question

Find the first term and common difference of the Arithmetic Progressions whose n^th term is given below

t_n = – 3 + 2n

Answer 1

a = t₁ = – 3 + 2(1)

= – 3 + 2 = – 1

d = t₂ – t₁

Here t₂ = – 3 + 2(2)

= – 3 + 4 = 1

∴ d = t₂ – t₁

= 1 – (– 1) = 2