Write equations for the given table in both recursive and explicit form

$\displaystyle {n}$	$\displaystyle {f{{\left({n}\right)}}}$
$\displaystyle -{4}$	$\displaystyle {405}$
$\displaystyle -{3}$	$\displaystyle {135}$
$\displaystyle -{2}$	$\displaystyle {45}$

Explicit: Preview Question 6 Part 1 of 2  

Recursive: Preview Question 6 Part 2 of 2