JEE Main 2024 Mathematics question
Let , and be a vector such that . If , then is equal to .
Answer: 30
Solution
(a + 2b) × c = −3(a × c) gives (4a + 2b) × c = 0, so c ∥ 2a + b = (4, −7, 15). With a·c = 130:
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.
Create a free account