✓ 5 MARKS
Long Answer
🔥 APPEARED IN 3 BOARD SETS
(a) Find the equations of the diagonals of the parallelogram PQRS whose vertices are P(4, 2, -6), Q(5, -3, 1), R(12, 4, 5) and S(11, 9, -2). Use these equations to find the point of intersection of diagonals.
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2023 | Series 65-2 | Set 1 | Question 33 |
| CBSE 2023 | Series 65-2 | Set 2 | Question 32 |
| CBSE 2023 | Series 65-2 | Set 3 | Question 34 (a) |
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)