find whether the points (-a, -b),[-(s+1)a,-(s+1)b] and [(t-1)a,(t-1)b] are collinear ?
Abhinab Nayak , 9 Years ago
Grade 12
Analytical Geometry> find whether the points (-a, -b),[-(s+1)a...
1 Answers
noogler
Last Activity: 9 Years ago
three points are said to be collinear if area f the triangle formed by the three points is zero.
x1 y1 1 -a -b 1
now lets find the area of triangle = x2 y2 1 = -(s+1)a -(s+1)b 1
x3 y3 1 -(1-t)a -(1-t)b 1
exp det it is so easy,take -a and -b as common then u get all 1’s in R1 and C3
on exp it will equal to zero. so these points are collinear
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