Question 295076
This web site doesn't tell me how to do these problems with only variables. My question is nPn. First Iwrote it out to n! over (n-n)!. then I got n! over 1. Then what do I do. Is is One? or is it n? i dont know what i did wrong.
<pre>
{{{nPn = n! = n*(n-1)*(n-2)*"..."*3*2*1}}}

{{{0!=1}}}

{{{nP0=1}}}

{{{nP1=n}}}

Edwin</pre>