Find the First Term a_n=4n-1

$a_{n} = 4 n - 1$

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

$a_{1} = 4 (1) - 1$

Multiply $4$ by $1$ .

$a_{1} = 4 - 1$

Subtract $1$ from $4$ .

$a_{1} = 3$

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