Question

Determine o determinante de cada uma das matrizes
Contas na foto

Answer 1

a)

A= (0 1)

(3 -2)

Det A=0.(-2)-1(3)=0-3=-3

b)B= (5 6 0)

(5 -3 1)

(7 0 2)

DetB=5(-6)-6(10-7)=-30-18=-48

c) C=(2 1)

(-3 4)

DetC=2.4-1.(-3)=8+3=11

d) D=(21 7)

(-3 1)

Det D=1.21-(-3).7=21+21=42

e) F=(-1 -2)

(5 3)

Det F=(-1).3-(-2).5= -3+10=7

f) G= (4 -1 0)

(5 7 6)

(2 1 3)

DetG=4(21-6)+1(15-12)=60+3=63

g) H= (3 2 5)

(4 1 3)

(2 3 4)

DetH=3(4-9)-2(16-6)+5(12-2)

DetH=-15-20+50=15

h) I= (0 3 0)

(-2 3 1)

(4 -2 5)

Det I=-3(-10-4)=(-3)(-14)=42

i) J= (2 2 0)

(1 1 1)

(4 3 0)

DetJ=2.(-3)-2(-4)=-6+8=2