How to practice topic:linear-algebra

Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.

Questions 1–10 of 21. Imported answers require independent review unless marked reviewed.

Topic practice 21 questionsPage 1 of 3

Question 26

Open question
ECMSQ1 markNeeds review
Consider the matrix

. Which of the following options is/are TRUE if

?
Your answerSelect all correct options. You can choose more than one.

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Question 11

Open question
ECMCQ1 markNeeds review
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)

.
Your answerChoose one option.

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Question 59

Open question
ECNAT2 marksNeeds review
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

,

.

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Question 30

Open question
ECNAT1 markNeeds review
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

does not form a basis of

is ______.

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Question 55

Open question
ECMSQ2 marksNeeds review
Consider the matrix

, where

is a positive real number. Which of the following vectors is/are eigenvector(s) of this matrix?
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Question 11

Open question
ECMCQ1 markNeeds review
Let

and

be two vectors. The value of the coefficient

in the expression

, which minimizes the length of the error vector

, is
Your answerChoose one option.

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Question 15

Open question
ECMCQ1 markNeeds review
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
Your answerChoose one option.

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Question 38

Open question
ECMCQ2 marksNeeds review
Let

be an

real column vector with length

. The trace of the matrix

is
Your answerChoose one option.

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Question 12

Open question
ECMCQ1 markNeeds review
Consider a system of linear equations

, where

This system of equations admits ________.
Your answerChoose one option.

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Question 37

Open question
ECMCQ2 marksNeeds review
Let

be two non-zero real numbers and

be two non-zero real vectors of size

. Suppose that

and

satisfy

,

, and

. Let

be the

matrix given by:

The eigenvalues of

are ________.
Your answerChoose one option.

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