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JEE ADVANCE 2012
paper 1
Question
If $\vec{a}, \vec{b}$ and $\vec{c}$ are unit vectors satisfying $|\vec{a}-\vec{b}|^2+|\vec{b}-\vec{c}|^2+|\vec{c}-\vec{a}|^2=9$, then $|2 \vec{a}+5 \vec{b}+5 \vec{c}|$ is
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Showing 18 questions
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