Question

Q = 9000
an
n
1
Q,=?

Answer 1

Answer: B

Explanation:

We can note this is a geometric sequence. Rewriting it as an explicit sequence, we get
`a_(n)=9000(1/3)^(n-1)`.

So therefore,
`a_(7)=9000(1/3)^(7-1)=1000/81`