Find the Third Term a_n=a_1r^(n-1)

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

Step 1

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

$a_{3} = a_{1} r^{(3) - 1}$

Step 2

Subtract $1$ from $3$ .

$a_{3} = a_{1} r^{2}$

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