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OCR (not MEI) C2 - Wednesday 20th May 2015

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Reply 100

sandpitturtle

You know them long 10 mark questions that when you finish you just check your pen and have to stretch your hand :h:

Reply 101

Issy :)

Original post by Kadak

Posted from TSR Mobile

I'm confused.For the trapezium rule,I thought it would be this set up,

It is the same thing. I just put my multiples of 2 at the end for convenience. The formula book puts them on order. It gives the same value :smile:

Reply 102

Shakzey

How is everyone feeling for tomorrows exam, how well prepared are you guys?

Reply 103

Killerpenguin15

Yep i'm ready for this exam!

... No i'm not :frown:

Reply 104

onsmirnov

Had to recap some implicit differentiation to make the circle gradient questions easier

Reply 105

onsmirnov

Original post by Killerpenguin15

Yep i'm ready for this exam!

... No i'm not :frown:

You should consider doing some revision or C2 past papers if your feeling brave :smile:

Reply 106

onsmirnov

Can someone explain logs to me, they really confuse me

What is MEI anyway?

Good luck to everyone taking C2 tomorrow! Hoping it's something like last year or Solomon J but I don't see it happening

Reply 109

ellieee1513

Original post by onsmirnov

Can someone explain logs to me, they really confuse me

They confuse me a bit too although I think if you know the laws and can apply them then it'll be fine.

As far as I know, I think these are the main ones: And they only work when the bases in both logs are the same.
logx + logy = log(xy)
logx - logy = log(x/y)
log x(power of n) = nlogx

Hope this has helped a little bit.

Reply 110

Chenice

http://www.ocr.org.uk/Images/136129-question-paper-unit-4722-core-mathematics-2.pdf

Q9)b)i) can anyone help?

Reply 111

LucieTeresa

I've been doing a load of past papers and I'm still pooing it for tomorrow... I think it's because I got everything on Core 1, did all the past papers at least twice, got nearly 100% in all of them, and still feel like I may have not even scraped a C...

And everyone is saying it was a nice Core 1 paper? Am I missing something?

Reply 112

Inkozzo

Original post by gabby07

Hi can I just check with someone, if you are using the formula for S_nfor a Geometric Progression:

\frac{a(1 - r^n)}{1-r}

with a value of r which is greater than 1, do you switch the equation to:

\frac{a(r^n - 1)}{r-1}

Is this correct??!
Thanks :smile:

To be honest I just use the one in the formula book for any value of r and in all my past papers I've done I haven't had any issue.

Reply 113

username1533709

https://68baf9f6baae001b7abe18b6e880c559742888e3.googledrive.com/host/0B1ZiqBksUHNYUlVQUzA0enkzVFU/January%202008%20QP%20-%20C2%20OCR.pdf
For question 9(i)
I confused I got min as (-90,0) and max as (90,0).What am I missing ?

Reply 114

Peppercrunch

Original post by Chenice

http://www.ocr.org.uk/Images/136129-question-paper-unit-4722-core-mathematics-2.pdf

Q9)b)i) can anyone help?

So
-1 < log2y < 1
as r = log2y

as you know r can only be -1 < r < 1

1/2 < y < 2

Reply 115

c223

I'm going to bed because 3 exams today was a killer (I actually threw up after the last exam lol) but I just wanted to say good luck to everyone tomorrow, hope it goes well! :smile:

Reply 116

Peppercrunch

Original post by Kadak

Remember it's 2sinx so it's a stretch of scale factor 2

So it's
(-90, -2) for the minimum and (90, 2) for the maximum

You forgot the y axis co-ordinate.

Reply 117

username1533709

Original post by Peppercrunch

Remember it's 2sinx so it's a stretch of scale factor 2

So it's
(-90, -2) for the minimum and (90, 2) for the maximum

You forgot the y axis co-ordinate.

Ty !Ho would I go though ii a and ii b ?

Reply 118

sandpitturtle

Q9 on june 2012 was the hardest log question ive done, hoping tomorrow is with same consitency as the c1 (like a standard paper) nothing ridiclous :smile:

Reply 119

sandpitturtle