mhsjdm5881 mhsjdm5881
  • 23-10-2017
  • Mathematics
contestada

Suppose a and b are 3x3 matrices, with det(a) = 5 and det(b) = 3.
a. det(2a) = ? 4 pts
b. det((ab)-1) = ?

Respuesta :

LammettHash
LammettHash LammettHash
  • 27-10-2017
[tex]\det(2\mathbf A)=2^3\det\mathbf A=8\times5=40[/tex]

[tex]\det(\mathbf{AB})^{-1}=\dfrac1{\det\mathbf{AB}}=\dfrac1{\det\mathbf A\det\mathbf B}=\dfrac1{5\times3}=\dfrac1{15}[/tex]
Answer Link

Otras preguntas

how do the people feel when Roosevelt gave the four freedom speech​
To get to work in the morning, Amanda cycles for 10 miles at the rate of 12 mph. She makes a 10 minutes stop for a cup of coffee, and then rides a bus for 15 mi
14/7 2/4 a. > b. < c. =
Find the value of x please help :(
Can someone please help me with this!
HELLPPP!! GIVING BRAINLIST TO WHOEVER ANSWERS QUESTION CORRECTLY AND DESCRIBES THE WAY THEY FOUND THE ANSWER
What is the x-intercept of the line 3x – 7y = 42? PLEASE HELP
6. On a coordinate plane, vertex A for triangle ABC is located at (6, 4). Triangle ABC is dilated by a scale factor of 0.5 with the center of dilation at the or
If Billy weighs 120N on earth, how much will he weigh on the moon
The function is defined by f(x)=7+4x/4+x find f(x+1)