# If A be an invertible matrix and inverse of 7A is,then matrix A is

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# Solutions(s) to the equations 2x+3y=1 x-y=4 4x-y=a Will exist if a is equal to

1.  -33

2.  0

3.  9

4.  12

4

12

Explanation :
No Explanation available for this question

# Matrix B=AT,where A is any matrix is

1.  Skew symmetric

2.  Symmetric about the secondary diagonal

3.  Always symmetric

4.  Another general matrix

4

Always symmetric

Explanation :
No Explanation available for this question

# If AT=A-1,where A is a real matrix,then A is

1.  Normal

2.  Symmetric

3.  Hermitian

4.  Orthogonal

4

Orthogonal

Explanation :
No Explanation available for this question

# If A and B are non-zero square matrices,then AB=I implies

1.  A and B are orthogonal

2.  A and B are singular

3.  B is singular

4.  A  is singular

4

A and B are orthogonal

Explanation :
No Explanation available for this question

# Eigen values of a square symmetric matrix are always

1.  Positive

2.  Real and imaginary

3.  Negative

4.  Real

4

Real

Explanation :
No Explanation available for this question

# If,then statetransition matrix eAt is

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# For matrix,if one of the eigen values is equal to -2,then which of the following is an eigen vector

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# If,then (a+b) equals

1.  7/20

2.  3/20

3.  19/60

4.  11/20

4

7/20

Explanation :
No Explanation available for this question

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