# Thread: equation involving n factorial

1. ## equation involving n factorial

Dear Sir
I would appreciate very much if you can
help me with the below question.
Thanks very much
Kingman

find n if
n ! = 3 to the power of 2007

2. Originally Posted by kingman
Dear Sir
I would appreciate very much if you can
help me with the below question.
Thanks very much
Kingman

find n if
n ! = 3 to the power of 2007

Did you mean $n!=3^{2007}$ ? Then don't worry: it has no soution since any factorial with $n\geq 2$ must be even...

Tonio

3. 3^2007 ends with an odd digit.
5! = 120; if n>4, last digit always 0.
Are you sure you got that problem correct?

4. ## Thanks for the prompt reply

i can see that there is something wrong with the question and i will check on it.
thanks