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JEE Main 2018Medium

Q.The unit vector in the direction opposite to a⃗=−2i^+3j^+k^\vec{a} = -2\hat{i} + 3\hat{j} + \hat{k} is

a
2i^−3j^−k^14\dfrac{2\hat{i} - 3\hat{j} - \hat{k}}{\sqrt{14}}
b
−2i^+3j^+k^14\dfrac{-2\hat{i} + 3\hat{j} + \hat{k}}{\sqrt{14}}
c
2i^−3j^−k^14\dfrac{2\hat{i} - 3\hat{j} - \hat{k}}{14}
d
−2i^+3j^+k^14\dfrac{-2\hat{i} + 3\hat{j} + \hat{k}}{14}

Correct Answer: Option A

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

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