IBMediumVectors10–12
Vectors \vec{a} = (1, 2) and \vec{b} = (3, k). Find k if \vec{a} and \vec{b} are parallel.
Vetores \vec{a} = (1, 2) e \vec{b} = (3, k). Determina k se \vec{a} e \vec{b} são paralelos.
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Solution
Parallel vectors: \vec{b} = \lambda \vec{a} \Rightarrow (3, k) = \lambda(1, 2). So \lambda = 3 and k = 6.