The two vectors $\vec{A} = 2 \hat{i} - 3 \hat{j} + \hat{k}$ and $\vec{B} = \hat{i} + 2 \hat{j} + x \hat{k}$ are perpendicular. Find x ?

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Correct option is D

A→.B→=AxBx+AyBy+AzBz =0when the vectors are perpendicular.A→.B→=2-6+x=0⇒x=4

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