1
KCET 2017
MCQ (Single Correct Answer)
+1
-0
If $\left|\begin{array}{ll}3 & x \\ x & 1\end{array}\right|=\left|\begin{array}{ll}3 & 2 \\ 4 & 1\end{array}\right|$, then $x$ is equal to
A
4
B
8
C
2
D
$\pm 2 \sqrt{2}$
2
KCET 2017
MCQ (Single Correct Answer)
+1
-0
If $2\left|\begin{array}{ll}1 & 3 \\ 0 & x\end{array}\right|+\left|\begin{array}{ll}y & 0 \\ 1 & 2\end{array}\right|=\left|\begin{array}{ll}5 & 6 \\ 1 & 8\end{array}\right|$, then the value of $x$ and $y$ are
A
$x=3, y=3$
B
$x=-3, y=3$
C
$x=3, y=-3$
D
$x=-3, y=-3$
3
KCET 2017
MCQ (Single Correct Answer)
+1
-0
If $A$ is a square matrix of order $3 \times 3$, then $|K A|$ is equal to
A
$K^2|A|$
B
$K|A|$
C
$3 K|A|$
D
$K^3|A|$
4
KCET 2017
MCQ (Single Correct Answer)
+1
-0

If $A=\frac{1}{\pi}\left|\begin{array}{ll}\sin ^{-1}(\pi x) & \tan ^{-1}\left(\frac{x}{\pi}\right) \\ \sin ^{-1}\left(\frac{x}{\pi}\right) & \cot ^{-1}(\pi x)\end{array}\right|$

$B=\left|\begin{array}{cc}-\cos ^{-1}(\pi x) & \tan ^{-1}\left(\frac{x}{\pi}\right) \\ \sin ^{-1}\left(\frac{x}{\pi}\right) & -\tan ^{-1}(\pi x)\end{array}\right|$,

then $A-B$ is :

A
0
B
$\frac{1}{2}$ I
C
$/$
D
$2!$
KCET Subjects
EXAM MAP