Katherine
22/03/2016 • 12:52
Resolvendo: 4!+4!/2!
4x3x2x1 + 4x3x2x1 / 2x1 = 24+24/2 _ 24
4x3x2x1 + 4x3x2x1 / 2x1 = 24+24/2 _ 24