Question

calcule as seguintes determinantes :
a) /1 2/
/3 4/
b) /2 9/
/ 3 7/
C) /1 -1/
/2 2/
d) /-2 4/
/ 0 -3/

Answer 1

Vamos là.

a) /1 2/

/3 4/

det = 1*4 - 2*3 = -2

b) /2 9/

/ 3 7/

det = 2*7 - 3*9 = -13

c) /1 -1/

/2 2/

det = 2 + 2 = 4

d) /-2 4/

/ 0 -3/

det = -2*-3 = 6