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Mathematics for IGCSE & O level - Vectors (Section 3 - No. 39)

If a = [2, 1] and b = [1, 3], what is the magnitude of a + b?
5
√13
√10
10

Selitys

a + b = [3, 4]. Then magnitude of a + b = √(3^2 + 4^2) = 5.

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