Vidyalelo
Engineering Maths · all questions

Linear Algebra
practice.

Practice every MCQ with options. Use Show answers when you want the correct option and solution.

183

Questions

1/10

Page

Pick an option on a question to see the right answer and solution.

If  is an eigen vector of the following matrix \left[ {\begin{array}{*{20}{c}} 1&{ - 1}&0 \\ { - 1}&2&{ - 1} \\ 0&{ - 1}&1 \end{array}} \right]   then corresponding eigen value is

Select an option to see the answer and solution.

The eigen values of the following matrix are \left[ {\begin{array}{*{20}{c}} { - 1}&3&5 \\ { - 3}&{ - 1}&6 \\ 0&0&3 \end{array}} \right]

Select an option to see the answer and solution.

Let A be the 2 × 2 matrix with elements a11 = a12 = a21 = +1 and a22 = -1. Then the eigen values of the matrix A19 are

Select an option to see the answer and solution.

How many of the following matrices have an eigen value 1?
\left[ {\begin{array}{*{20}{c}} 1&0 \\ 0&0 \end{array}} \right],\left[ {\begin{array}{*{20}{c}} 0&1 \\ 0&0 \end{array}} \right],\left[ {\begin{array}{*{20}{c}} 1&{ - 1} \\ 1&1 \end{array}} \right]{\text{ and }}\left[ {\begin{array}{*{20}{c}} { - 1}&0 \\ 1&{ - 1} \end{array}} \right]

Select an option to see the answer and solution.

A real square matrix A is called skew-symmetric if

Select an option to see the answer and solution.

If {\text{R}} = \left[ {\begin{array}{*{20}{c}} 1&0&{ - 1} \\ 2&1&{ - 1} \\ 2&3&2 \end{array}} \right],    then top row of R-1 is

Select an option to see the answer and solution.

Let, {\text{A}} = \left[ {\begin{array}{*{20}{c}} 2&{ - 0.1} \\ 0&3 \end{array}} \right]   and {{\text{A}}^{ - 1}} = \left[ {\begin{array}{*{20}{c}} {\frac{1}{2}}&{\text{a}} \\ 0&{\text{b}} \end{array}} \right].
Then (a + b) = ?

Select an option to see the answer and solution.

We have a set of 3 linear equations in 3 unknowns. 'X Y' means X and Y are equivalent statements and 'X Y' means X and Y are not equivalent statements.
P : There is a unique solution.
Q : The equations are linearly independent.
R : All eigen values of the coefficient matrix are nonzero.
S : The determinant of the coefficient matrix is nonzero.
Which one of the following is TRUE?

Select an option to see the answer and solution.

The elgen values of the matrix {\text{A}} = \left[ {\begin{array}{*{20}{c}} 1&{ - 1}&5 \\ 0&5&6 \\ 0&{ - 6}&5 \end{array}} \right]   are

Select an option to see the answer and solution.

Consider the following simultaneous equations (with c1 and c2 being constants):
3x1 + 2x2 = c1
4x1 + x2 = c2
The characteristics equation for these simultaneous equations is

Select an option to see the answer and solution.

For the matrix {\text{A}} = \left[ {\begin{array}{*{20}{c}} 3&{ - 2}&2 \\ 0&{ - 2}&1 \\ 0&0&1 \end{array}} \right],    one of the eigen values is equal to -2. Which of the following is an eigen vector?

Select an option to see the answer and solution.

What are the eigen values of the following 2 × 2 matrix?
\left[ {\begin{array}{*{20}{c}} 2&{ - 1} \\ { - 4}&5 \end{array}} \right]

Select an option to see the answer and solution.

Eigen values of the matrix \left[ {\begin{array}{*{20}{c}} 3&{ - 1}&{ - 1} \\ { - 1}&3&{ - 1} \\ { - 1}&{ - 1}&3 \end{array}} \right]   are

Select an option to see the answer and solution.

If {\text{A}} = \left[ {\begin{array}{*{20}{c}} 1&5 \\ 6&2 \end{array}} \right]   and {\text{B}} = \left[ {\begin{array}{*{20}{c}} 3&7 \\ 8&4 \end{array}} \right],\,{\text{A}}{{\text{B}}^{\text{T}}}    is equal to

Select an option to see the answer and solution.

The number of linearly independent eigen vectors of \left[ {\begin{array}{*{20}{c}} 2&1 \\ 0&2 \end{array}} \right]  is

Select an option to see the answer and solution.

A 3 × 3 matrix P is such that, P3 = P. Then the eigen values of P are

Select an option to see the answer and solution.

One of the eigen vectors of matrix is \left[ {\begin{array}{*{20}{c}} { - 5}&2 \\ { - 9}&6 \end{array}} \right]  is

Select an option to see the answer and solution.

For the matrix \left[ {\begin{array}{*{20}{c}} 4&2 \\ 2&4 \end{array}} \right]  the eigen value corresponding to the eigen vector \left[ {\begin{array}{*{20}{c}} {101} \\ {101} \end{array}} \right] is

Select an option to see the answer and solution.

The eigen values of matrix \left[ {\begin{array}{*{20}{c}} 9&5 \\ 5&8 \end{array}} \right] are

Select an option to see the answer and solution.

Consider the 5 × 5 matrix {\text{A}} = \left[ {\begin{array}{*{20}{c}} 1&2&3&4&5 \\ 5&1&2&3&4 \\ 4&5&1&2&3 \\ 3&4&5&1&2 \\ 2&3&4&5&1 \end{array}} \right]
It is given that A has only one real eigen value.
Then the real eigen value of A is

Select an option to see the answer and solution.