Question

Calcule: a) 4! +5!
b) 7!/ 5!
c) A 6,2
d) C 10,3

Answer 1

Resposta:

a) 4*3*2*1 = 24

5*4*3*2*1 = 120

120 + 24 = 144

b) 7*6*5*4*3*1= 5040

5*4*3*2*1 = 120

5040/120= 42

c) A6,2

6!/(6-2)!

6*5*4*3*2*1= 720

6-2= 4

4! = 24

720/24 = 30

d) C10,3

10!/3!.(10-3)!

10!/3!.7! = 10*9*8/6 = 720/6 = 120

Explicação passo-a-passo: