Parametric locus question (1 Viewer)

[enigma_1]

What process do I need to use for 13c? Do you have to show that its gradient is undefined or something?

 

[RealiseNothing]

Show that they have the same x co-ordinates.

 

[bokat]

Find the gradient of PS (S is the focus.).
Find the gradient of QS.
Equate the two gradients to show that pq=-1.
Use pq=-1 to show that the x coordinates of U and R are equal.
Hope it helps.
Reza Bokat,
Cambridge Coaching
www.cambridgecoaching.com.au