Understanding and applying determinants

Which of the following matrices will have an inverse?

• A
• B
• C
• D

• A

• A - I

• A + I

• 3A

Diketahui matriks A dan B, dan

 $A^2=xA+yB$ . Nilai  $xy=$  ....

• -4

• -1

•  $-\frac{1}{2}$  

•  $1\frac{1}{2}$  

• 2

Is matrix D invertible?

• 15

• 5

• 0

• -5

Jika  $A^t=$ transpose matriks A dan  $AX=B+A^t$  , maka determinan matriks X adalah ....

• -5

• -1

• 1

• 5

• 8

What’s the inverse of this matrix?

• 1/34

• 34

• 1/25

• 25

The solution X of the matrix

equation

A×X=B is given by

• 
• 
• 
• 

• 0

• 1

• 2

• 4

If A is any invertible matrix then A is

• square matrix

• non singular matrix

• both

• none of these

If A is singular matrix, then A (adj A) =

• a unit matrix

• a null matrix

• a symmetric matrix

• none of these