Question

Find K if point A(1, 2), B(1/2, 3 and C(0, K) are collinear

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Answer 1

x1(y2-y3)+x2(y3-y1)+x3(y1-y2)=0

1(3-k)+1/2(k-2)+0(2-k)=0

3-k+1/2k-1=0

2-1/2k=0

-1/2k=-2

1/2k=2

k=4

HOPE THIS HELPS