Question

Me ajudem a calcular essas contas???

Answer 1

Resposta:

Explicação passo-a-passo:

a) $P_6=6!=6*5*4*3*2*1=720$

b) $C_{6,4}=\frac{6!}{4!2!}=\frac{6.5.4!}{4!2}=15$

c) $A_{8,5}=\frac{8!}{3!}=\frac{8.7.6.5.4.3!}{3!}=6.720$

d) $P_4=4! = 4.3.2.1=24$

e) $A_{9,4}=\frac{9!}{5!}=\frac{9.8.7.6.5!}{5!}=3.024$

f) $C_{10,7}=\frac{10!}{7!3!}=\frac{10.9.8.7!}{7!6}=120$

g) $P_8=8.7.6.5.4.3.2.1=40.320$

h) $A_{7,4}=\frac{7!}{3!}=\frac{7.6.5.4.3!}{3!}=840$