## Algebra and Trigonometry 10th Edition

$a_n=4n-1$
$a_1=3=4(1)-1$ $a_2=7=4(2)-1$ $a_3=11=4(3)-1$ $a_4=15=4(4)-1$ $a_5=19=4(5)-1$ Each term is 1 less four times $n$: $a_n=4n-1$