✓ 1 MARKS
MCQ
🔥 APPEARED IN 3 BOARD SETS
For a square matrix $A$, $(3A)^{-1} =$
A
$3A^{-1}$
B
$9A^{-1}$
C
$\frac{1}{3}A^{-1}$
D
$\frac{1}{9}A^{-1}$
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2026 | Series 65-2 | Set 1 | Question 5 |
| CBSE 2026 | Series 65-2 | Set 2 | Question 16 |
| CBSE 2026 | Series 65-2 | Set 3 | Question 9 |
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)