Question

28 Calcule:
a) 6!
b) 4!
c) 0! + 1!
d) 3! - 2!
e) 7! – 5!
f) 5 .3!

29 Obtenha o valor de cada uma das expressões seguintes:
a)8!/6!
b)9!/10!
c)3!/4! +4!/5!
d)7!/5! .2!
e)20!/18! . 2!
f) 8! . 6!/7! . 7!
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Answer 1

Resposta:

Olá,

a) 6! = 6.5.4.3.2.1 = 720

b) 4! = 4.3.2.1 = 24

c) 0! + 1! = 0 + 1 = 1

d) 3! - 2! = 3.2.1 - 2.1 = 4

e) 7! - 5! = 7.6.5.4.3.2.1 - 5.4.3.2.1 = 4920

f) 5.3! = 5 × 3.2.1 = 5 × 6 = 30

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a) 8!/6! = 8.7.6.5.4.3.2.1 ÷ 6.5.4.3.2.1 = 39600

b) 9!/10! = 9.8.7.6.5.4.3.2.1 ÷ 10.9.8.7.6.5.4.3.2.1 = 362880

c) 3!/4! + 4!/5! = 3.2.1 ÷ 4.3.2.1 + 4.3.2.1 ÷ 5.4.3.2.1 = 1,25

d) 7!/5! × 2 = 7.6.5.4.3.2.1 ÷ 5.4.3.2.1 × 2 = 84

e) 20!/18! × 2 = 20.19.18.17.16.15.14.13.12.11.10.9.8.7.6.5.4.3.2.1 ÷ 18.17.16.15.14.13.12.11.10.9.8.7.6.5.4.3.2.1 = 380

f) 8! . 6!/7! . 7! = 8.7.6.5.4.3.2.1 × (6.5.4.3.2.1 ÷ 7.6.5.4.3.2.1) × 7.6.5.4.3.2.1 = 8/7