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wait - as a hypethetical, say if you had the following: a point C that divides externally a and b in the ratio 1:2 What would, graphically, be correct: C- - - - - - -A- - - - - - - - - - - - - - -B C- - - - - - - - - - - - - - -A- - - - - - -B...

thankyou thankyou

Quick.. what's the equations for a point that divides AB internally or externally in the ratio p:q

at first that question looked like a question 7 toughy

thats focus.. locus is the parapola.. a locus is something that satisfies given criteria (eg equidistant from a line and focus)

Yeah I did another silly mistake, 480 is right. I keep ignoring the posibility of them sitting on different sides to each other

thanks :)

oh.. dear.. god.. I am going to fail. Is that the only question type they'll give us? or are there a variety of nonsensical questions like that one?

what about 2002 question 3 (a) (ii) I have 600 as the answer, want to confirm it :)

7! - 6! I thought..

uhh it depends on the given information. eg they give you directrix and focus, and you find a and the vertex and sub into (x-h)^2=4a(y-k) where the vertex is (h, k)

Yes, of course I know how to find locuses.. I just never understood how using a third dynamic term worked.

Umm.. that'll help me find their gradients.. then would I use y-y1=m(x-x1) or are there other tips/tricks/etc I can do?

Okay thanks, I had pretty much that but wasnt sure about the x10 (aka 10C9) bit, thanks :)

Okay I hate this chapter, to me it makes no sense whatsoever. I can create the cartesian equation from two x= and y= equations of course, but I can not understand the tangents to points P, Q, and anything like that. Could someone give me some general tips or a brief explanation?

For that example, what would you get?

*shudder* I hated that.. I used it in the trials twice so I could get two equations and thingy them to get x and y... bad idea

umm divide by x^2, then sub in x=infinity, which reduces everything to basically 0, for all units which have a greater power of x on the denominator. 4x^2/x^2 of course cancels to 4, and 3x^2/x^2 cancels to 3. I left the x there as when x goes to infinity, it stays as x.. if that makes sense...

This is how you solve problems including the third variable *stabs third variable with a knife*

Could someone post up the answers quickly for this, if they have them? :) Thanks