Question

20. Find the value of 'a' for which the following points Aſa, 3), B(2, 1) and C(5, a) are
collinear. Hence, find the equation of the line.
(2014)​

Answer 1

Answer:

Points A (a,3) B (2,1 )and c (5 , a) are collinear. If the points are collinear the area of triangle is 0. Therefore, The value of a are 4,-1.