Question

Given the geometric sequence where a1 = −1 and the common ratio is 7, what is the domain for n?

Answer 1

You want \(7=\dfrac{a_2}{a_1}=\dfrac{a_3}{a_2}=\dfrac{a_4}{a_3}\)

And we know \(a_1=-1\) so what do we need \(a_2\) to be?

\(7=\dfrac{a_2}{-1}\)

Answer 2

7?

Answer 3

ok.

Answer 4

\(\dfrac{7}{-1}=7\) ?

Answer 5

yes