OCR MEI C3 Maths June 2015

So I kinda screwed up the coursework, meaning i'm going to have to get 70-71/72 to get 90%. Anyone know whether the 90% in C3 and C4 is needed for both exams? Or is taken as an average?

Also, can I redo my coursework without redoing my exams? If they go well that is.

anyone got a list of what each transformation means

i.e. f(ax) is a strethc in the y direction by a?????

f(ax) is a stretch in the x direction by 1/a!!!

Dont suppose you can list them all can you??

so what would


bf(ax) be??

On June 2014 Q9iii how do we know that the grad of tangent = -m

I read the bit before but still dont understand?

Link the paper.

9iii
http://www.sixthform.m34maths.com/A-level%20exams/c3/c314juQ.pdf

I'm just about to do this paper so don't want to look at the mark scheme I'll reply when I get to that question if no one else has answered.

because OP and the tangent are equally inclined to the x axis. The gradient of the line y=mx is m. Equally inclined means the gradients are the same but looking at the graph the line and the tangent form an "X" shape so the gradient of the tangent must be negative m (-m). hope that helps

the x axis is the base of the triangle

Got 71 in June 2014 so I think I'm ready (didn't say rotational symmetry about origin of order 2)

Good luck tomorrow everyone!