 Solution

ID: past-exam-of-the-mathematics-course-of-the-year-1-of-the-natural-sciences-course-of-the-university-of-cambridge/2024/paper-1/1/a/solution

The modulus is the Euclidean norm, obtained by taking the square root of the dot product of the vector with itself:

1^{2} + 2^{2} + 1^{2} = 6 .

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