Identify the Sequence 162 , 108 , 72 , 48

$162$ , $108$ , $72$ , $48$

Step 1

This is a geometric sequence since there is a common ratio between each term. In this case, multiplying the previous term in the sequence by $\frac{2}{3}$ gives the next term. In other words, $a_{n} = a_{1} r^{n - 1}$ .

Geometric Sequence: $r = \frac{2}{3}$

Step 2

This is the form of a geometric sequence.

$a_{n} = a_{1} r^{n - 1}$

Step 3

Substitute in the values of $a_{1} = 162$ and $r = \frac{2}{3}$ .

$a_{n} = 162 {(\frac{2}{3})}^{n - 1}$

Step 4

Apply the product rule to $\frac{2}{3}$ .

$a_{n} = 162 \frac{2^{n - 1}}{3^{n - 1}}$

Step 5

Combine $162$ and $\frac{2^{n - 1}}{3^{n - 1}}$ .

$a_{n} = \frac{162 \cdot 2^{n - 1}}{3^{n - 1}}$

Identify the Sequence 162 , 108 , 72 , 48

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