Q.The vectors $\vec{a} = 2\hat{i} + 3\hat{j} + 4\hat{k}$ , $\vec{b} = \hat{i} - \hat{j} + \hat{k}$ are perpendicular if

true

false

only if magnitude zero

none

The correct solution involves applying the fundamental concept to derive the final value step by step...

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Q.The vectors a⃗=2i^+3j^+4k^\vec{a} = 2\hat{i} + 3\hat{j} + 4\hat{k}a=2i^+3j^​+4k^, b⃗=i^−j^+k^\vec{b} = \hat{i} - \hat{j} + \hat{k}b=i^−j^​+k^ are perpendicular if