Loading...

Loading, please wait...

Back to Topics

Engineering Mathematics
Linear Algebra

Practice questions from Linear Algebra.

7
Total
0
Attempted
0%
0
Correct
0%
0
Incorrect
0%
Q#1 Linear Algebra GATE EC 2025 (Set 1) MCQ +1 mark -0.33 marks

Consider the matrix  below:

 

For which of the following combinations of , and , is the rank of  at least three?

(i)  and .

(ii) .

(iii)  and .

(iv) .

Only (i), (iii), and (iv)

Only (iv)

Only (ii)

Only (i) and (iii)

Explanation:

The given matrix is in standard Echelon form,

rank of matrix  if  or

rank of matrix  = 4 if   or  and

Thus, (i), (iii), (iv) satisfy the echelon form requirement

Q#2 Linear Algebra GATE EC 2025 (Set 1) NAT +2 marks -0 marks

Consider the vectors

 

For real-valued scalar variable , the value of

  is _________ (rounded off to two decimal places).

 denotes the Euclidean norm, i.e., for .

Explanation:

Given:

 

 

Let

 

 

 

For  

should also minimum.

 

 

  

        

Q#3 Linear Algebra GATE EC 2024 (Set 1) NAT +1 mark -0 marks

Let  and  denote the set of real numbers and the three-dimensional vector space over it, respectively. The value of for which the set of vectors

Dose not form a basis of is__________.

Explanation:

Basis set of vectors is a linearly independent set and hence if the set does not form a basis then the matrix formed by its vectors should have determinant to be 0.

 

For the set to not form a basis,

 

 

 

Q#4 Linear Algebra GATE EC 2024 (Set 1) MSQ +2 marks -0 marks

Consider the matrix where k is a positive real number. Which of the following vectors is/are eigenvector(s) of this matrix?

Explanation:

 

 

 

 

If ,

 

 

 =0

 

 

Similarly, if

 

Q#5 Linear Algebra GATE EC 2023 (Set 1) MCQ +1 mark -0.33 marks

Let  and  be two vectors. The value of the coefficient  in the expression , which minimizes the length of the error vector , is

Explanation:

From the given expression, we can write

The error vector can be calculated as.

 

 

 

Taking its magnitude, we get

 

 

at

 stationary point

Q#6 Linear Algebra GATE EC 2023 (Set 1) MCQ +1 mark -0.33 marks

Let the sets of eigenvalues and eigenvectors of a matrix  be  and , respectively. For any invertible matrix , the sets of eigenvalues and eigenvectors of the matrix , where , respectively, are

 and

 and

 and

 and

Explanation:

Given input is

 

 are called matrices similar.

 Both  have same set 7 eigen values

Matrix A & B   has different eigen vector.

Let

 Eigen vectors of  are .

Q#7 Linear Algebra GATE EC 2023 (Set 1) MCQ +2 marks -0.66 marks

Let  be an  real column vector with length . The trace of the matrix  is

Explanation:

Given the vector length is,

Let  

 

 

let the Vector in expanding form.

 

Trace of