Question

v) (n-1) (n + 1) (n?+1)​

Answer 1

Answer:

This is simply the definition of the factorial function. If it helps, you can write out the values on each side.

(n+1)!=(n+1)(n)(n−1)…(2)(1)

n!=(n)(n−1)…(2)(1)

Notice how n! contains all of the same terms as (n + 1)!, except for the (n + 1).