JAMB Mathematics 2025 Objective — Question 40
Question 40 of 40 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2025 Objective paper, with the correct answer and a full explanation.
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The position vectors of points A and B are (3i+4j) and (5i-2j) respectively. What is the magnitude of vector AB?
- A. 2√5
- B. 2√10Correct
- C. 2√15
- D. 3√6
Explanation
AB = (5-3)i+(-2-4)j = 2i-6j. |AB|=√(4+36)=√40=2√10.
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