Mathematics for IGCSE & O level - Vectors (Section 1 - No. 1)
If \(\vec{a} = \begin{pmatrix} 2 \\ 5 \end{pmatrix}\), what is the magnitude of \(\vec{a}\)?
7
3
\(\sqrt{29}\)
29
Explanation
Magnitude is sqrt(2^2 + 5^2) = sqrt(4+25) = sqrt(29)
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