Question

Me ajudem com essas questões

Answer 1

Resposta:

Explicação passo a passo:

a.

C20,20=

20!/20!(20-20)!=

1/0!=

1/1=

1

b.

C8,1=

8!/1!(8-7)!=

8!/1!.1!=

40320/1=

40320

c.

C7,0=

7!/0!(7-0)!=

7!/0!7!=

5040/1.5040=

5040/5040=

1

d.

C6,1=

6!/1! (6-1)!=

6!/1.5!=

6.5!/5! = [corta 5!]

6

e.

C7,2=

7!/2!(7-2)!=

7!/2!5!=

7.6.5!/2.5! = [corta 5!]

7.6/2=

42/2=

21

f.

C7,3=

7!/3!(7-3)!=

7!/3!4!=

7.6.5.4!/3!4!= [corta 4!]

7.6.5/6= [corta 6]

7.5=

35

g.

C8,2=

8!/2!(8-2)!=

8!/2!6!=

8.7.6!/2!6!= [corta 6!]

8.7/2=

56/2=

28

C8,0=

8!/0!(8-0)!=

8!/0!8!= [corta 8!]

1/0!=

1/1=

1

1+28+1=30