Question

prove that (1,1) (2,2) (4,4) are collinear​

Answer 1

1*2-4*+2*4-1*+4*1-2

1-2+2-3+4-1

-2+6-4

4-4

=0

Answer 2

Step-by-step explanation:

Let point P be (x1-y1),(x2-y2)&(x3-y3) are (1,1),(2,2)&(4,4).

Now, for collinear point P :-

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

= 1(2-4)+2(4-1)+4(1-2)

= -2+6-4=0.

*the given points are collinear.