AP EAMCET · Maths · Three Dimensional Geometry
Which of the following points lie on the plane passing through \(2 \hat{\mathbf{i}}+3 \hat{\mathbf{j}}-\hat{\mathbf{k}}, 3 \hat{\mathbf{i}}+2 \hat{\mathbf{j}}+\hat{\mathbf{k}}\) and \(\hat{\mathbf{i}}+\hat{\mathbf{j}}+4 \hat{\mathbf{k}}\) ?
- A \(2 \hat{\mathbf{i}}-3 \hat{\mathbf{j}}+12 \hat{\mathbf{k}}\) and \(2 \hat{\mathbf{i}}+\hat{\mathbf{j}}+\frac{5}{2} \hat{\mathbf{k}}\)
- B \(2 \hat{\mathbf{i}}-3 \hat{\mathbf{j}}+13 \hat{\mathbf{k}}\) and \(2 \hat{\mathbf{i}}+\hat{\mathbf{j}}+6 \hat{\mathbf{k}}\)
- C \(2 \hat{\mathbf{i}}-3 \hat{\mathbf{j}}+13 \hat{\mathbf{k}}\) and \(2 \hat{\mathbf{i}}+\frac{3}{2} \hat{\mathbf{j}}+\frac{5}{2} \hat{\mathbf{k}}\)
- D \(2 \hat{\mathbf{i}}+6 \hat{\mathbf{k}}\) and \(2 \hat{\mathbf{i}}+\frac{3}{2} \hat{\mathbf{j}}+3 \hat{\mathbf{k}}\)
Answer & Solution
Correct Answer
(C) \(2 \hat{\mathbf{i}}-3 \hat{\mathbf{j}}+13 \hat{\mathbf{k}}\) and \(2 \hat{\mathbf{i}}+\frac{3}{2} \hat{\mathbf{j}}+\frac{5}{2} \hat{\mathbf{k}}\)
Step-by-step Solution
Detailed explanation
Let \(\mathbf{O A}=2 \hat{\mathbf{i}}+3 \hat{\mathbf{j}}-\hat{\mathbf{k}}=\mathbf{a}\) \[ \mathbf{O B}=3 \hat{\mathbf{i}}+2 \hat{\mathbf{j}}+\hat{\mathbf{k}}=\mathbf{b} \] \[ \mathbf{O C}=\hat{\mathbf{i}}+\hat{\mathbf{j}}+4 \hat{\mathbf{k}}=\mathbf{c} \] \(\because\) Vector…
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