Matrices_3

If A and B are symmetric matrices, then ABA is a

•   Symmetric matrix   

• Skew- symmetric matrix

• Diagonal matrix

• Scalar matrix

If  a matrix is both symmetric and skew symmetric, then

• A is a diagonal matrix

• A is a zero matrix

• A diagonal matrix   

•   an upper triangular matrix.

• 
• 
• 
• None of these

• 1

• 4

• 0

• None Of these

If the matrix is symmetric then

• x = 2 ; y = - 3

• x = 2 ; y = 3

• x = - 2 ; y = 3

• x = - 2 ; y = - 3

The matrix given here is

• Diagonal

• Symmetric

• Skew Symmetric

• Scalar

• Symmetric

• Skew Symmetric

• Diagonal

• None of these

  If A = A’ then

• x = 5 , y = - 3

• x = - 3 , y = 5

• x = y

• None of these

• Symmetric

• Skew- Symmetric

• nULL mATRIX

• nONE OF THESE