Evaluate:
(i) \(8!\)
(ii) \(4! - 3!\)
(i) 40320
(ii) 18
Is \(3! + 4! = 7!\)?
30, No
Compute \(\dfrac{8!}{6! \times 2!}\)
28
If \(\dfrac{1}{6!} + \dfrac{1}{7!} = \dfrac{x}{8!}\), find \(x\)
64
Evaluate \(\dfrac{n!}{(n-r)!}\) for:
(i) \(n = 6, r = 2\)
(ii) \(n = 9, r = 5\)
(i) 30
(ii) 15120