Question

The Y-axis divides the line segment
joining A(a1,b1) and B(a2,b2) in the
ratio​

Answer 1

Answer:

Let the required ratio be m:n

here,x1=1. ,x2=−2, y1=1, y2=2

Then, According to question, we have ;

m+nmx2+mx1=0

⇒m(1)+n(2)=0

⇒2n=m

⇒m=2n

⇒n/m=2/1

⇒m:n=2:1 

Coordinate of the point of division

=(0,my2+ny1/n+m)

=(0,2(2)+1(1)/2+1)

=(0,4+1/3)

=(0,5/3)