✓ 1 MARKS
MCQ
🔥 APPEARED IN 3 BOARD SETS
If $A$ is a non-singular matrix, then which of the following is not true ?
A
$\text{adj } A$ is singular
B
$(\text{adj } A)^{-1} = (\text{adj } A^{-1})$
C
$|A| \neq 0$
D
$A^{-1}$ exists
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2026 | Series 65-5 | Set 1 | Question 5 |
| CBSE 2026 | Series 65-5 | Set 2 | Question 6 |
| CBSE 2026 | Series 65-5 | Set 3 | Question 3 |
02 // OFFICIAL CBSE MARKING SCHEME BREAKDOWN
- Step 1: Stating the fundamental formula / law statement (+1 Mark)
- Step 2: Intermediate mathematical substitution or proof steps (+1 Mark)
- Step 3: Correct final value or conclusion with mandatory SI units (+1 Mark)