✓ 1 MARKS
MCQ
🔥 APPEARED IN 3 BOARD SETS
If a square matrix A is such that $\text{A}^2 = \text{A}$ and $(\text{I} - \text{A})^3 = \text{xA} + \text{I}$, then value of x must be :
A
7
B
5
C
$-7$
D
$-1$
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2026 | Series 65-3 | Set 1 | Question 5 |
| CBSE 2026 | Series 65-3 | Set 2 | Question 16 |
| CBSE 2026 | Series 65-3 | 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)