Question

how is(n+1)!=n(n+1)(n-1)

Answer 1

actually your question is-

"how is (n+1)!=(n+1)n(n-1)"

therefore,consider this-

let n=6(just as an example)

so, we have (6+1)!=(6+1)6(6-1)...

7! = 7. 6. 5...