What is the 23rd term of this pattern: 7, -21, 63, - and determine if it’s arithmetic or geometric ! answer this

ANSWER

The pattern is geometric.

EXPLANATION

The given pattern is:

7, -21, 63, -189,..

We can see from the pattern that,

Since there is a common ratio of -3, the pattern is geometric.

The first term of this pattern is

The nth term of the pattern is given by the formula:

To find the 23rd term, we put, n=23, the first term and the constant ratio.

a

explanation:

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb