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JEE Main 2018Medium

Q.The vector in the direction of the vector i^−2j^+2k^\hat{i} - 2\hat{j} + 2\hat{k} that has magnitude 9 is

a
3(i^−2j^+2k^)3(\hat{i} - 2\hat{j} + 2\hat{k})
b
9(i^−2j^+2k^)9(\hat{i} - 2\hat{j} + 2\hat{k})
c
(i^−2j^+2k^)/3(\hat{i} - 2\hat{j} + 2\hat{k})/3
d
(i^−2j^+2k^)/9(\hat{i} - 2\hat{j} + 2\hat{k})/9

Correct Answer: Option A

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

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