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AP EAMCET · Maths · Vector Algebra

Let the position vectors of the vertices of a triangle \(A B C\) be \(\bar{a}, \bar{b}, \bar{c}\). If on the plane of the triangle, \(P\) is a point having position vector \(\bar{x}\) such that \(\bar{x} \cdot(\bar{c}-\bar{b})=\bar{a} \cdot \bar{c}-\bar{a} \cdot \bar{b}\) and \(\bar{x} \cdot(\bar{a}-\bar{c})=\bar{a} \cdot \bar{b}-\bar{b} \cdot \bar{c}\), then for the triangle \(A B C\), \(P\) is the

  1. A Centroid
  2. B Circumcentre
  3. C Incentre
  4. D Orthocentre
Verified Solution

Answer & Solution

Correct Answer

(D) Orthocentre

Step-by-step Solution

Detailed explanation

\( (\bar{x}-\bar{a}) \cdot (\bar{c}-\bar{b}) = 0 \) \( \vec{AP} \perp \vec{BC} \) \( (\bar{x}-\bar{b}) \cdot (\bar{a}-\bar{c}) = 0 \) \( \vec{BP} \perp \vec{CA} \) Orthocentre