What is the 15th term of the sequence 20, 16, 12

Solution:

The given sequence is an arithmetic series with

First term a = 20

The common difference d = 16 - (20) = 12 - 16 = -4

The nth term of an arithmetic series is given by the expression:

T_n = a + (n-1)d

T₁₅ = 20 + (15 - 1)(-4)

T₁₅ = 20+ 14(-4)

T₁₅ = 20 - 56 = -36

T₁₅ = - 36

What is the 15th term of the sequence 20, 16, 12

Summary:

The 15th term of the sequence 20, 16, 12 is -36