Question

I really do not understand this at all.

n!/(n - k)! = n(n - 1)...(n - k + 1) true or false

Answer 1

It is false

@torontoXO

Answer 2

Can you explain @dpasingh

Answer 3

Ok...

Answer 4

\[\frac{n!}{(n - k)!} =\frac{n (n-1)!}{(n - k)(n-k-1)!} =\frac{n (n-1)(n-2)!}{(n - k)(n-k-1)(n-k-2)!} \]

thus from the above result you can easily conclude that
n!/(n - k)! = n(n - 1)...(n - k + 1) is false.

@torontoXO

Answer 5

Ohh ok. Understandable. Thanks bro much appreciation