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AP EAMCET · Maths · Straight Lines

In quadrilateral \(A B C D, \mathbf{A B}=\mathbf{a}, \mathbf{B C}=\mathbf{b}\), \(\mathbf{A D}=\mathbf{b}-\mathbf{a}\) if \(M\) is the midpoint of \(B C\) and \(N\) is a point on \(D M\) such that \(D N=\left(\frac{4}{5}\right) D M\), then \(5 \mathbf{A N}=\)

  1. A \(\mathrm{AC}\)
  2. B \(2 \mathrm{AC}\)
  3. C \(3 \mathrm{AC}\)
  4. D 4AC
Verified Solution

Answer & Solution

Correct Answer

(C) \(3 \mathrm{AC}\)

Step-by-step Solution

Detailed explanation

It is given that for a quadrilateral \(A B C D\), \(\mathbf{A B}=\mathbf{a}, \mathbf{B C}=\mathbf{b}, \mathbf{A D}=\mathbf{b}-\mathbf{a}\) \(\therefore\) According to the question, \(\mathbf{B M}=\frac{\mathbf{b}}{2}\) and…