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Mathematics for IGCSE & O level - Vectors (Section 3 - No. 27)

Given that vector p = [2, 1] and vector q = [3, -1], what is the result of 2p - q?
[1, 3]
[1, 0]
[7, 1]
[4, -1]

Paliwanag

2p - q = 2[2, 1] - [3, -1] = [4, 2] - [3, -1] = [1, 3].

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