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SMK Teknologi dan Rekayasa

Solusi Paket 59 UN 2011 Matematika SMK Teknologi (23)


Diketahui\ vektor\ \vec{a}=3\vec{i}-2\vec{j}+4\vec{k}\ dan\ \vec{b}=\vec{i}+5\vec{j}-3\vec{k}\ maka\ vektor\ 2\vec{a}+\vec{b}= ....\\A.\ \ 7\vec{i}+3\vec{j}+\vec{k}\ \ \ \ \ \ \ \ \ \ B.\ \ 7\vec{i}+\vec{j}+5\vec{k}\ \ \ \ \ \ \ \ \ C.\ \ 5\vec{i}+8\vec{j}-2\vec{k}\\D.\ \ 5\vec{i}-7\vec{j}+7\vec{k}\ \ \ \ \ \ \ \ E.\ \ 4\vec{i}+3\vec{j}+\vec{k}
Jawaban: B
\frac{\begin{matrix} \ 2\vec{a}=6\vec{i}-4\vec{j}+8\vec{k}\\ \ \ \ \ \vec{b}=\vec{i}+5\vec{j}-3\vec{k}\end{matrix}}{}\ +\\2\vec{a}+\vec{b}=7\vec{i}+\vec{j}+5\vec{k}

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