Question

fatoriais de 7 menos os fatoriais de 5

Answer 1

7!=7.6.5.4.3.2.1=5040
5!=5.4.3.2.1=120
5040-120=4920

Answer 2

7 fatorial (7!) =

7*6*5*4*3*2

42*5*4*3*2

210*4*3*2

840*3*2

2520*2

5040

5 fatorial (5!) =

5*4*3*2

20*3*2

60*2

120

Ou seja

5040-120 = 4920