Question

What is the value of the 23rd term in the sequence 10, 8, 6, 4, ...?

-36
176
-34
-218

Answer 1

-34

Explanation:

Set rule

T = -2(n) + 12

23rd Term

T23 = -2 × 23 + 12

= -34

Answer 2

T23=a+22d

d=T2-T1

d=8-10=-2

a(first term)=10

T23=10+22×-2

=10+(-44)

=10-44

=-34

therefore:T23=-34