The line segment joining the points and is divided at the point in the ratio and it lies on the line . Find the value of .

Answer and explanation

Correct answer: A.

  1. Step 1: Coordinates of : , .
  2. Step 2: Substitute into line: .
  3. Step 3: .
Answer
.
Why not the others: moves to the right without sign change; computes ; and has both sign and arithmetic errors.

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