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Vectors exam tips
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Vectors
AqaA LevelComputer ScienceFundamentals of data structures
Exam tips
Check convex-combination conditions explicitly
When identifying or constructing a convex combination, write down both checks: α ≥ 0 and β ≥ 0, then verify that α + β = 1.
A response that only checks the coefficient sum, or only checks non-negativity, does not fully establish that the expression is a convex combination.
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