11*10!=n!
The ! sign is used to indicate the factorial function. N! means N*(N-1)*(N-2)*...*3*2*1
So, for example, 5! = 5*4*3*2*1 = 120
.
n=11, so that,
11!=11*10!
10!=10*9*8*7*6*5*4*3*2*1
11*10!=11!
11!=n!
n=11
To the Guest that helped: You should totally make an account :)
What does the ! Mean?