CBSE Class 10 Answered
If the points A(7,-2), B(5,1) and C(3,k) are collinear, the find the value of k.
Asked by Topperlearning User | 24 Nov, 2013, 05:11: AM
Expert Answer
If three points A, B and C are collinear, then the area of triangle ABC = 0.
[7(1-k)+5(k+2)+3(-2-1)] = 0
7-7k+5k+10-9=0
-2k+8=0
k=4
Thus, the given points are collinear for k=4.
Answered by | 24 Nov, 2013, 07:11: AM
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