Question

Quanto daria Y=3p4-2A6,2???

Answer 1

y=3*4 × 3 × 2 × 1 - 2 * 6!/(6-2)! 
y=72- 2 * 30 = 72- 60 = 12

Answer 2

Boa tarde

permutaçôes
p(4) = 4! = 24 

aranjos
A(6,2) = 6!/(6 - 2)! = 6!/4! = 6*5 = 30 

y = 3p(4) - 2A(6,2) 
y = 3*24 - 2*30
y = 72 - 60 = 12