Question

What is the nth term rule of the linear sequence below?
13, 7, 1, -5, -11,...

Answer 1

7

Explanation:

7/9

Answer 2

aₙ = a₁ - 6* (n-1)

Explanation:

a₁ = 13 = 13 - 6* (1-1)

a₂ = 7 = 13 - 6 * 1 = 13- 6*(2-1)

a₃ = 1 = 7 - 1 = 13 - 6 * 2 = 13 - 6 * (3-1)

........

aₙ = a₁ - 6* (n-1)

check: a₅ = 13 - 6*4 = -11