Algebra Examples

$a_{n} = 4 {(5)}^{n - 1}$

Step 1

Substitute in the value of $n$ to find the $n$ th term.

$a_{2} = 4 {(5)}^{(2) - 1}$

Step 2

Subtract $1$ from $2$ .

$a_{2} = 4 \cdot 5$

Step 3

Multiply $4$ by $5$ .

$a_{2} = 20$