Practice problem
What is the value of ((n−1)!)2n!(n−2)!(n−1)\dfrac{((n-1)!)^2}{n!(n-2)!(n-1)}n!(n−2)!(n−1)((n−1)!)2 ?
1n\dfrac{1}nn1
nnn
n!n!n!
Type a concept, like “slope” or “photosynthesis”.