1
KCET 2026
MCQ (Single Correct Answer)
+1
-0
If A and B are invertible matrices of same order, then which of the following is not correct?
A
$A \cdot (\text{adj}A) = (\text{adj}A) \cdot A = A I$
B
$A \cdot (\text{adj}A) = (\text{adj}A) \cdot A = |A |I$
C
$(AB)^{-1} = B^{-1} A^{-1}$
D
$|A| \neq 0, |B| \neq 0$
2
KCET 2026
MCQ (Single Correct Answer)
+1
-0
Let X be a matrix of order $2 \times n$ and Z be a matrix of order $2 \times p$. If $n = p$, then the order of the matrix $8X - 9Z$ is:
A
$2 \times n$
B
$p \times 2$
C
$n \times 3$
D
$p \times n$
3
KCET 2026
MCQ (Single Correct Answer)
+1
-0
A row matrix has only
A
One element
B
One row with one or more columns
C
One column with one or more rows
D
One row and one column
4
KCET 2026
MCQ (Single Correct Answer)
+1
-0
Consider the following statements:
Statement I: If A is a non-singular matrix, then $A^{-1}$ exists.
Statement II: If A and B are symmetric matrices of same order, then $(AB - BA)$ is a skew symmetric matrix.
Choose the correct option.
A
Statement I is true and Statement II is false
B
Statement I is false and Statement II is false
C
Statement I is true and Statement II is true
D
Statement I is false and Statement II is true