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Determinants (May 2) - JEE MCQ


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10 Questions MCQ Test Daily Test for JEE Preparation - Determinants (May 2)

Determinants (May 2) for JEE 2024 is part of Daily Test for JEE Preparation preparation. The Determinants (May 2) questions and answers have been prepared according to the JEE exam syllabus.The Determinants (May 2) MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Determinants (May 2) below.
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Determinants (May 2) - Question 1

Let a =  , then Det. A is  

Detailed Solution for Determinants (May 2) - Question 1

Apply C2 → C2 + C3,



 

Determinants (May 2) - Question 2

Detailed Solution for Determinants (May 2) - Question 2

because , the value of the determinant is zero only when , the two of its rows are identical., Which is possible only when Either x = 3 or x = 4 .

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Determinants (May 2) - Question 3

Detailed Solution for Determinants (May 2) - Question 3

Apply , R1 → R1+R2+R3,



Apply , C3→ C- C1, C2C2 - C1,

=(a+b+c)3

Determinants (May 2) - Question 4

If A and B matrices are of same order and A + B = B + A, this law is known as

Detailed Solution for Determinants (May 2) - Question 4

Commutative law, in mathematics, either of two laws relating to number operations of addition and multiplication, stated symbolically: a + b = b + a and ab = ba

Determinants (May 2) - Question 5

If A’ is the transpose of a square matrix A , then

Detailed Solution for Determinants (May 2) - Question 5

The determinant of a matrix A and its transpose always same.

Determinants (May 2) - Question 6

The value of the determinant  is

Detailed Solution for Determinants (May 2) - Question 6

, Apply , C2 → C2 + C3





= 0, (∵ C1 = C2)

Determinants (May 2) - Question 7

The roots of the equation det.   are

Detailed Solution for Determinants (May 2) - Question 7

⇒ (1-x)(2-x)(3-x) = 0 ⇒x = 1,2,3

Determinants (May 2) - Question 8

If A is a square matrix of order 2 , then det (adj A) = x

Detailed Solution for Determinants (May 2) - Question 8

Let A be a square matrix of order 2 . then ,|adj.A| = |A|

Determinants (May 2) - Question 9

If A is a symmetric matrix, then At =

Detailed Solution for Determinants (May 2) - Question 9

If A is a symmetric matrix then by definition AT=A
Option A is correct.

Determinants (May 2) - Question 10

Detailed Solution for Determinants (May 2) - Question 10

, because , row 1 and row 3 are identical.

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