1
JEE Main 2022 (Online) 26th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

If the system of equations

$$\alpha$$x + y + z = 5, x + 2y + 3z = 4, x + 3y + 5z = $$\beta$$

has infinitely many solutions, then the ordered pair ($$\alpha$$, $$\beta$$) is equal to :

A
(1, $$-$$3)
B
($$-$$1, 3)
C
(1, 3)
D
($$-$$1, $$-$$3)
2
JEE Main 2022 (Online) 26th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Let A be a 3 $$\times$$ 3 invertible matrix. If |adj (24A)| = |adj (3 adj (2A))|, then |A|2 is equal to :

A
66
B
212
C
26
D
1
3
JEE Main 2022 (Online) 26th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The ordered pair (a, b), for which the system of linear equations

3x $$-$$ 2y + z = b

5x $$-$$ 8y + 9z = 3

2x + y + az = $$-$$1

has no solution, is :

A
$$\left( {3,{1 \over 3}} \right)$$
B
$$\left( { - 3,{1 \over 3}} \right)$$
C
$$\left( { - 3, - {1 \over 3}} \right)$$
D
$$\left( {3, - {1 \over 3}} \right)$$
4
JEE Main 2022 (Online) 25th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The system of equations

$$ - kx + 3y - 14z = 25$$

$$ - 15x + 4y - kz = 3$$

$$ - 4x + y + 3z = 4$$

is consistent for all k in the set

A
R
B
R $$-$$ {$$-$$11, 13}
C
R $$-$$ {13}
D
R $$-$$ {$$-$$11, 11}
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