1
WB JEE 2021
MCQ (More than One Correct Answer)
+2
-0
$$\left| {\matrix{ x & {3x + 2} & {2x - 1} \cr {2x - 1} & {4x} & {3x + 1} \cr {7x - 2} & {17x + 6} & {12x - 1} \cr } } \right| = 0$$ is true for
A
only one value of x
B
only two value of x
C
only three values of x
D
infinitely many value of x
2
WB JEE 2019
MCQ (More than One Correct Answer)
+2
-0
Let $$A = \left[ {\matrix{ 3 & 0 & 3 \cr 0 & 3 & 0 \cr 3 & 0 & 3 \cr } } \right]$$. Then, the roots of the equation det $$(A - \lambda {I_3})$$ = 0 (where I3 is the identity matrix of order 3) are
A
3, 0, 3
B
0, 3, 6
C
1, 0, $$-$$6
D
3, 3, 6
3
WB JEE 2018
MCQ (More than One Correct Answer)
+2
-0
In a third order matrix A, aij denotes the element in the ith row and jth column. If aij = 0 for i = j

= 1 for i > j

= $$-$$ 1 for i < j

Then the matrix is
A
skew symmetric
B
symmetric
C
not invertible
D
non-singular
WB JEE Subjects
Physics
Mechanics
Electricity
Optics
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
Coordinate Geometry
Calculus
EXAM MAP
Joint Entrance Examination