- #1

karush

Gold Member

MHB

- 3,269

- 5

$10^{\dfrac{5^n -1}{4}} \Huge\vert (5^n)!$

for all $Z^+$

ok this was sent to me on email but thot I could solve it but ?

first I assume the vertical bar means such that

not sure if ! means factorial or not negative

anyway curious