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If two vectors \(\vec{P}=\hat{i}+2m\hat{j}+m\hat{k}\) and \(\vec{Q}=4\hat{i}-2\hat{j}+m\hat{k}\) are perpendicular to ea…

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

[JEE Main 2023, 24 Jan (Shift 2)]

a

1

b

-1

c

-3

d

2

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