Question

If nPr=nCr then find the value of x?

Answer 1

`r = 0, r = 1`

Explanation:

`nPr=nCr`

`(n!)/((n - r)!) = (n!)/((n-r)!r!)`

`1 = 1/(r!)`

`r! = 1`

`r = 0, 1`

btw, what is x?