If the points A(7, -2), B(5, 1) and C(3, k) are collinear, then find the value of k.
Asked by Topperlearning User | 24th Nov, 2013, 05:21: AM
If the points A, B and C are collinear, then the area of triangle ABC = 0.
[7(1-k)+5(k+2)+3(-2-1)] = 0
Thus, the points are collinear for k=4.
Answered by | 24th Nov, 2013, 07:21: AM
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