Neco 2021 Further Mathematics Question 25
Practice objective / multiple choice question 25 from the 2021 Neco Further Mathematics examination.
In three‑dimensional space let \\( \\mathbf{a} = \\langle 2, -1, 3 \\rangle \\). A vector \\( \\mathbf{b} \\) satisfies \\( \\mathbf{a} \\times \\mathbf{b} = \\langle 4, 8, -2 \\rangle \\) and \\( \\mathbf{a} \\cdot \\mathbf{b} = 10 \\). Find the magnitude \\( |\\mathbf{b}| \\).
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About This Question
This is Neco 2021 Further Mathematics Question 25. It is one of the objective questions from the 2021 Neco Further Mathematics examination.
Difficulty level: Hard .
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