Question

Given the arithmetic sequence, what is a18? 18,14,10 A18=

Answer 1

The first term is a1 = 18
The common difference is d=-4

And the nth term of an arithmetic sequence is given by
an = a1 + (n-1)d

Plugging in what we know:

an = 18 + (n-1)(-4)

So find the 18th term of this arithmetic sequence,
replace n with 18,

a18 = 18 + (18-1)(-4)

and simplify.

Answer 2

18 is the starting term and the common difference is -4
Hope it helped!!!