Find the nTH term of this sequence: 15, 12, 9, 6

Question

Mathematics

Antwan Barajas

16 March, 01:24

Find the nTH term of this sequence: 15, 12, 9, 6

+2

Answers (2)

Know the Answer?

Keyla Barrett · Answer 1

-3n + 18

Step-by-step explanation:

an = dn + (a - d)

The difference is - 3.

The first term is 15.

an = - 3n + (15 - (-3))

an = - 3n + 15 + 3

an = - 3n + 18

Giovanni Cummings · Answer 2

aₙ = 18 - 3n

Step-by-step explanation:

15, 12, 9, 6

Given AP with first term = 15 and common difference = - 3

aₙ=a₁ + (n-1) d = 15 + (n-1) * (-3) = 15 - 3n+3 = 18-3n

aₙ = 18 - 3n