1
KCET 2022
MCQ (Single Correct Answer)
+1
-0

If $$A=\left[\begin{array}{ll}2 & -1 \\ 3 & -2\end{array}\right]$$, then the inverse of the matrix $$A^3$$ is

A
A
B
$$-1$$
C
1
D
$$-A$$
2
KCET 2022
MCQ (Single Correct Answer)
+1
-0

If $$A$$ is a skew symmetric matrix, then A$$^{2021}$$ is

A
Row matrix
B
Column matrix
C
Symmetric matrix
D
Skew symmetric matrix
3
KCET 2022
MCQ (Single Correct Answer)
+1
-0

If $$A=\left[\begin{array}{ll}0 & 1 \\ 0 & 0\end{array}\right]$$, then $$(a I+b A)^n$$ is (where $$I$$ is the identify matrix of order 2)

A
$$a^2 I+a^{n-1} b \cdot A$$
B
$$a^n I+n \cdot a^{n-1} b \cdot A$$
C
$$a^n I+n a^n b A$$
D
$$a^n I+b^n A$$
4
KCET 2022
MCQ (Single Correct Answer)
+1
-0

If $$A$$ is a $$3 \times 3$$ matrix such that $$|5 \cdot \operatorname{adj} A|=5$$, then $$|A|$$ is equal to

A
$$\pm 1$$
B
$$\pm 1 / 25$$
C
$$\pm 1 / 5$$
D
$$\pm 5$$
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