blacktown_
Member
- Joined
- Apr 30, 2012
- Messages
- 65
- Gender
- Male
- HSC
- 2013
please help with these questions.
show working out please!
1. Find the point of intersection of the normals to the parabola x^2 =-12y at the points (4, -1 1/3) and (-2, -1/3)
2. a. Find the equation of the tangent to the parabola x^2 =12y at the point P (6,3). ( the answer is x-y-3=0, but i don't know how to do the next two questions)
b. find R, the y-intercept of the tangent
c. Show that FP=FR where F is the focus
thankyou
show working out please!
1. Find the point of intersection of the normals to the parabola x^2 =-12y at the points (4, -1 1/3) and (-2, -1/3)
2. a. Find the equation of the tangent to the parabola x^2 =12y at the point P (6,3). ( the answer is x-y-3=0, but i don't know how to do the next two questions)
b. find R, the y-intercept of the tangent
c. Show that FP=FR where F is the focus
thankyou