1
WB JEE 2008
MCQ (Single Correct Answer)
+1
-0.25

The values of x for which the given matrix $$\left[ {\matrix{ { - x} & x & 2 \cr 2 & x & { - x} \cr x & { - 2} & { - x} \cr } } \right]$$ will be non-singular are

A
$$ - 2 \le x \le 2$$
B
for all x other than 2 and $$-$$2
C
$$x \ge 2$$
D
$$x \le - 2$$
2
WB JEE 2008
MCQ (Single Correct Answer)
+1
-0.25

If the matrix $$\left[ {\matrix{ a & b \cr c & d \cr } } \right]$$ is commutative with the matrix $$\left[ {\matrix{ 1 & 1 \cr 0 & 1 \cr } } \right]$$ then

A
a = 0, b = c
B
b = 0, c = d
C
c = 0, d = a
D
d = 0, a = b
3
WB JEE 2009
MCQ (Single Correct Answer)
+1
-0.25

If A is a square matrix. Then

A
A + AT is symmetric
B
AAT is skew-symmetric
C
AT + A is skew-symmetric
D
ATA is skew-symmetric
4
WB JEE 2009
MCQ (Single Correct Answer)
+1
-0.25

If A2 $$-$$ A + I = 0, then the inverse of the matrix A is

A
A $$-$$ I
B
I $$-$$ A
C
A + I
D
A
WB JEE Subjects
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12