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      Question

      If the points A(1, 2), B(0, 0) and C(a, b) are

      collinear, then
      A a = 2b Correct Answer Incorrect Answer
      B 2a = b Correct Answer Incorrect Answer
      C a = –b Correct Answer Incorrect Answer
      D a = b Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Given points A(1,2), B(0,0), and C(a,b) are collinear. Condition for Collinearity The area of the triangle formed by these points must be zero:

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