Question:medium

If the scalar projection of the vector \(x\mathbf{i} - \mathbf{j} + \mathbf{k}\) on the vector \(2\mathbf{i} - \mathbf{j} + 5\mathbf{k}\) is \(\frac{1}{\sqrt{30}}\) then value of \(x\) is equal to

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Scalar projection = \(\frac{\mathbf{a} \cdot \mathbf{b}}{|\mathbf{b}|}\).
Updated On: Apr 23, 2026
  • \(\frac{-5}{2}\)
  • 6
  • -6
  • 3
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The Correct Option is A

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