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Study Stuff for MCA Examinations - NIMCET
Study Stuff for MCA Examinations - NIMCET
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Let $\vec{a}=\hat{i}+2\hat{j}+3\hat{k}$, $\vec{b}=2\hat{i}+3\hat{j}-5\hat{k}$ and $\vec{c}=3\hat{i}-\hat{j}+\lambda\hat{k}$ be three vectors.
Let $\vec{r}$ be a unit vector along $\vec{b}+\vec{c}$.
If $\vec{r}\cdot\vec{a}=3$, then $3\lambda$ is equal to:
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