If two vectors $\vec{P}=\overset{^}{i}+2m\overset{^}{j}+m\overset{^}{k}$ and $\vec{Q}=4\overset{^}{i}−2\overset{^}{j}+m\overset{^}{k}$ are perpendicular to each other. Then, the value of m will be:

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If two vectors \(\vec{P}=\overset{^}{i}+2m\overset{^}{j}+m\overset{^}{k}\) and \(\vec{Q}=4\overset{^}{i}−2\overset{^}{j}…

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