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 23. Imported answers require independent review unless marked reviewed.

Topic practice 23 questionsPage 1 of 3

Question 11

Open question
MEMCQ1 markNeeds review
Let A and B be real symmetric matrices of same size. Which one of the following options is correct?
Your answerChoose one option.

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Question 14

Open question
MEMCQ1 markNeeds review
Consider the system of linear equations

The values of

and

such that there exists a non-trivial null space and the system admits infinite solutions are
Your answerChoose one option.

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Question 36

Open question
MEMCQ2 marksNeeds review
The matrix

(where

) has a negative eigenvalue if

is greater than
Your answerChoose one option.

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Question 32

Open question
MENAT1 markNeeds review
A linear transformation maps a point

in the plane to the point

according to the rule

Then, the disc

gets transformed to a region with an area equal to ________ . (Rounded off to two decimals)
Use π = 3.14.

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Question 15

Open question
MEMCQ1 markNeeds review
If

is a symmetric matrix, the value of

is ____________.
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Question 46

Open question
MEMSQ2 marksNeeds review
The system of linear equations in real

given by

involves a real parameter

and has infinitely many non-trivial solutions for special value(s) of

. Which one or more among the following options is/are non-trivial solution(s) of

for such special value(s) of

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

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Question 46

Open question
MEMSQ2 marksNeeds review
A is a

real matrix of rank 2. For the set of homogeneous equations

, where

is a zero vector and

is a vector of unknown variables, which of the following is/are true?
Your answerSelect all correct options. You can choose more than one.

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Question 48

Open question
MENAT2 marksNeeds review
If the sum and product of eigenvalues of a

real matrix

are 4 and

respectively, then

is _____ (in integer).

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Question 1

Open question
MEMCQ1 markNeeds review
Consider an

matrix

and a non-zero

vector

. Their product

, where

and

. Based on the given information, the eigen value of

is:
Your answerChoose one option.

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Question 26

Open question
MEMCQ2 marksNeeds review
Consider a vector

in 2-dimensional space. Let its direction (counter-clockwise angle with the positive

-axis) be

. Let

be an eigenvector of a

matrix

with corresponding eigenvalue

,

. If we denote the magnitude of a vector

by

, identify the VALID statement regarding

, where

.
Your answerChoose one option.

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