Question

What is the common ratio of 9, 81, 729. -6561

Answer 1

Given:

Consider the given sequence is 9, 81, 729, 6561.

To find:

The common ratio.

Solution:

We have,

9, 81, 729, 6561

Here,

First term = 9

Second term = 81

Divide the second term by first term to get the common ratio.

$r=\dfrac{81}{9}$

$r=9$

Similarly,

$\dfrac{81}{9}=\dfrac{729}{81}=\dfrac{6561}{729}=9=r$

Therefore, the common ratio is 9.