Okay, can anyone help me with this problem- I will try to have a go myself as well.
Okay so there is a normal x and y axis. On this axis is a parabola y^2=4ax, flipped so that it looks like the letter C to the right of the y axis. The parabola is touching the y axis, with a vertex of (0,0). A line called x=a passes through the parabola so that it passes through the x axis and touches 2 opposite points of the parabola (this line is called a lactus rectum). The question asks to prove that 2 tangents (straight lines) that pass through the end points of the lactus rectum, intersects on the x axis at (-a,0). Ill post a diagram as well
Im unsure on how to go about this ??
Im guessing that we have to find the equations for the 2 tangents, and then make these two equations equal to eachother, because that would be the point where they intersect, then solve to find the point of intersection is at (-a,0)