Question

If the points (a, b), (a1, b1,) and (a - a1, b-b1.) are collinear
show that ab1 = a1b. Also show that the line joining the given points passes through the origin.​

Answer 1

Answer:

Step-by-step explanation:

Use determiant

1 1 1

a a1 a-a1

b b1 b-b1

And get ans this problem