4MA1/2H Jun 2019, Question 14: Magnitude of a Vector
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2H (Higher) · Calculator · 3 marks
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The question, in short
Given vectors AB = (6, −9) and CB = (1, 3), find the magnitude of vector AC.
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Solution · 3 marks
- 1AC→ = AB→ + BC→ = AB→ − CB→
- 2AC→ = (6 − 1, −9 − 3) = (5, −12)
- 3|AC→| = √(5² + (−12)²) = √169 = 13
Answer13
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