ENEM, perguntado por melmedez243, 4 meses atrás

me ajudemmmmmm!!!!!!!!!!

Anexos:

Soluções para a tarefa

Respondido por pbcrbr
1

Resposta:

Explicação:

1)

A=

[4 13 0]

[-2 3 -1]

B=

[-3 -5 6]

[2 15 2]

C=

[20 0 10]

[1 -1 5]

A)

A+B+C

4-3+20 13-5+0 0+6+10

-2+2+1 3+15-1 -1+2+5

=

[21 8 16]

[1 17 6]

________

B)

A=

[4 13 0]

[-2 3 -1]

B=

[-3 -5 6]

[2 15 2]

C=

[20 0 10]

[1 -1 5]

A - B + C

4-(-3)+20 13-(-5)+0 0-6+10

-2-2+1 3-15+(-1) -1-2+5

4+3+20 13+5 4

-4+1 -12-1 -3+5

=

R.:

[27 18 4]

[-3 -13 2]

__________

C)

A=

[4 13 0]

[-2 3 -1]

B=

[-3 -5 6]

[2 15 2]

C=

[20 0 10]

[1 -1 5]

A - B - C

4-(-3)-20 13-(-5)-0 0-6-10

-2-2-1 3-15-(-1) -1-2-5

=

-13 18 -16

-5 -11 - 8

==========

2)

A=

1 3

-4 2

B =

-2 0

3 1

A)

A.B

A.B =

[1 3] . [-2 0]

[-4 2] [3 1]

1.(-2)+3.3 1.0+3.1

(-4).(-2)+2.3 -4.0+2.1

-2+9 0+3

8+6 0+2

R.:

=

[7 3]

[14 2]

============

B)

B.A

[-2 0] . [1 3]

[3 1 ] . [-4 2]

-2.1+0.(-4) -2.3+0.2

3.1+1.(-4) 3.3+1.2

-2+0 -6+0

3-4 9+2

R.:

=

[-2 -6]

[-1 11]

__________

C)

2.(A.B)

2 x

[7 3]

[14 2]

R.:

=

[14 6]

[28 4]

___________

D)

[2 3 4] . [1 2 3]

[1 0 -2] . [2 5 6]

[0 4 1] . [3 -1 4]

C.D

2.1+3.2+4.3 2.2+3.5+4.(-1) 2.3+3.6+4.4

1.1+0.2-2.3 1.2+0.5-2.(-1) 1.3+0.6-2.4

0.1+4.2+1.3 0.2+4.5+1.(-1) 0.3+4.6+1.4

2+6+12 4+15-4 6+18+16

1-6 2+2 3-8

8+3 20-1 24+4

R.:

=

[20 15 40]

[-5 4 -5]

[11 19 28]


pbcrbr: Ok. Pronto
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