OCR MEI C2 MAY 18th

If they are then I apologise . I forgot to divide by 2 myself, so I was just going off what my mates said.

No worries. I'm sure that caught many people out

pretty sure it was y = 100x^3

cuz gradient = 3 and y intercept = 2

so log y = 3logx + 2
as 2 = logy then y = 100
so logy = 3logx + log100
so logy =logx^3x100
so y = 100x^3

how can the gradient = 3, the axis were logY and logX so the co-ordinates also had to be logs, i did log(17/5) for change in Y and log5 for X and got 0.76

Doesn't matter about the axis, gradient is always Delta Y / Delta X.

In this case that was 12/4, hence 3.

Giving you log y = 3 log x + c

Yeah but that's why you look carefully and read the question a few times before answering, as you'd realise you just plug the numbers and then add 1 if needed. I see what you mean however.

Sequences/series can be quite tricky at times but they're always accessible.

so how did you find it

I thought the paper wasn't that difficult, there were a few tricky questions and the sequences question needed some thought.

I could have done better, I got the hard stuff right (it seems) but missed some easy marks! (classic me...)

What about yourself?

The only ones I know I got wrong were the last one and the trigonometry coordinates (or one set anyway). Idon't thinkI could have done much better tbh. I've stressed so much about this.

is anybody elses school making them klearn C3 now?

Fair enough, as long as you're happy with your paper, hopefully get the result you want.

Hopefully. I needed quite high as I know C1 didn't go so well for me. We'll just see on results day. Ithink I've definately improved upon my mock (D lol, and a low one at that)

That's good to hear, what are your other modules?

I only do Maths (med schools hate on FM for reasons beyond me) but I have Biology and Chemistry left.

The only ones I know I got wrong were the last one and the trigonometry coordinates (or one set anyway). Idon't thinkI could have done much better tbh. I've stressed so much about this.

is anybody elses school making them klearn C3 now?

did anyone get the last question about the ratios?

To do the ratios question you had to use the nth term of a geometric series for each of a and r to get

10 x 0.6^n-1 : 15 x 0.4^n-1

then you take out a factor of 0.4 and 0.6 to give

10 x 0.6 x 0.6^n-2 : 15 x 0.4 x 0.4^n-2

= 6 x 0.6^n-2 : 6 x 0.4^n-2

= 0.6^n-2 : 0.4^n-2

= 3^n-2 : 2^n-2