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BITSAT2018MathematicsVector AlgebraActual

In a ∆ A B C , D , E , F are the mid-points of the sides B C , C A and A B respectively, the vector A D → is equal to

Options

  1. AB E → + C F →
  2. BB E → - C F →
  3. CC F → - B E →
  4. D- B E → - C F →

Correct answer

D. - B E → - C F →

Step-by-step solution

A D → = 3 G D → = 3 · 1 2 G B → + G C → = 3 2 2 3 E B → + 2 3 F C → = - B E → - C F → Hence, option (d) is correct.

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