Question

Show that each sequence is geometric. Find the common ratio and write out the first four terms. (Can you explain how to do it too?)
> {(5/2)^n)
> {(3n/9)}
> {3^2n}

Answer 1

a.

r= (5/2)^(n+1) / (5/2)^n = 5/2

b. do the same thing on the last two, compare the ratio of the n+1 term t the n term. If it is constant, it is geometric.