AP EAMCET · Maths · Vector Algebra
The vectors \(\mathbf{a}=2 \hat{i}+3 \hat{j}+6 \hat{k}\) and \(\mathbf{b}\) are collinear and \(|\mathbf{b}|=2 \mathrm{l}\), then \(\mathbf{b}=\)
- A \(\pm(2 \hat{i}+3 \hat{j}+6 \hat{k})\)
- B \(\pm(6 \hat{i}+9 \hat{j}+18 \hat{k})\)
- C \(\frac{21}{\sqrt{3}}(\hat{i}+. \hat{j}+\hat{k})\)
- D \(\pm 21(2 \hat{i}+3 \hat{j}+6 \hat{k})\)
Answer & Solution
Correct Answer
(B) \(\pm(6 \hat{i}+9 \hat{j}+18 \hat{k})\)
Step-by-step Solution
Detailed explanation
If \(\mathbf{a}\) and \(\mathbf{b}\) are collinear, then…
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