Find the First Term a_n=12+(n-1)*-2

$a_{n} = 12 + (n - 1) \cdot - 2$

Step 1

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

$a_{1} = 12 + ((1) - 1) \cdot - 2$

Step 2

Simplify each term.

Subtract $1$ from $1$ .

$a_{1} = 12 + 0 \cdot - 2$

Multiply $0$ by $- 2$ .

$a_{1} = 12 + 0$

Step 3

Add $12$ and $0$ .

$a_{1} = 12$