(define (fatorial n )
(if (= n 0 ) 1
(* n (fatorial (- n 1)))))
(define (arranjo n p)
(/ (fatorial n) fatorial(- n p))
(write(fatorial 5))
(write(arranjo 5 2))
KGRlZmluZSAoZmF0b3JpYWwgbiApCihpZiAoPSBuIDAgKSAxCigqIG4gKGZhdG9yaWFsICgtIG4gMSkpKSkpCgooZGVmaW5lIChhcnJhbmpvIG4gcCkKICgvIChmYXRvcmlhbCBuKSBmYXRvcmlhbCgtIG4gcCkpCiAKKHdyaXRlKGZhdG9yaWFsIDUpKQood3JpdGUoYXJyYW5qbyA1IDIpKQ==