Question

Find an explicit rule for the nth term of the sequence.

2, -8, 32, -128, ...

Answer 1

my answer;

Answer 2

Same as do

http://www.mathskey.com/question2answer/16363/find-an-explicit-rule-for-the-nth-term-of-the-sequence-4-8-16-32

Answer 3

so i was right, right?

Answer 4

2, -8, 32, -128, ...
ratio= -8/2=-4
an= ar^n-1
=2(-4)^n-1

Answer 5

Mondona, try plugging in \(n = 1, 2, 3\cdots\) in your answer. Does it produce the correct values?

Answer 6

@bradely that was not correct

Answer 7

that was my answer before

Answer 8

- What is the first term?
- What is the common ratio?