NumericalModerate2 marks
Find 'a' if A (2a + 2, 3), B (7, 4) and C (2a + 5,2) are collinear.
Topic: Slope and equation of a line
Previous-year question practice database
Answer
Exam answer
a = 4
Explanation
For collinear points, area of ΔABC = 0 (or slopes AB and BC are equal). Substitution gives a = 4.
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