A vector of magnitude 9, which is perpendicular to both the vectors (4i - j + 8k) and (-j + k) is Option 1: 7i - 4j - 4k Option 2: 4i - 7j + 4k Option 3: 4i - 4j + 7k Option 4: -4i + 4j - 7k

The answer is '7i - 4j - 4k'. View full solution:

Algebra > Vector Algebra

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A vector of magnitude 9, which is perpendicular to both the vectors $(4\hat{i} - \hat{j} + 8\hat{k})$ and $(-\hat{j} + \hat{k})$ is

$7\hat{i} - 4\hat{j} - 4\hat{k}$

$4\hat{i} - 7\hat{j} + 4\hat{k}$

$4\hat{i} - 4\hat{j} + 7\hat{k}$

$-4\hat{i} + 4\hat{j} - 7\hat{k}$

✅ Correct Option: 1

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Choose the correct answer from the options given below:

A vector of magnitude 9, which is perpendicular to both the vectors $(4\hat{i} - \hat{j} + 8\hat{k})$ and $(-\hat{j} + \hat{k})$ is

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