How do I solve this for n without making a guess? n!(5-n)!=4! Is it possible to simply drop all the ! signs?
Hello, Stuck Man!
How do I solve this for n without making a guess? .$\displaystyle n!(5-n)!\:=\:4!$
Is it possible to simply drop all the ! signs? . No
There are only six possible choices: 0, 1, 2, 3, 4, 5.
We find the solutions are: .$\displaystyle n \,=\,1,\,4$