Year 12s: what will be the first way you research your future options? >>

Year 12s: what will be the first way you research your future options? >>

Year 12s: what will be the first way you research your future options? >>

OCR (non mei) C4 Friday 24th June 2016

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Arnaud Lawrence

Thought that was the answer to question 3

Original post by Arnaud Lawrence

Thought that was the answer to question 3

That is right just in the answers the 1/x^2 in the numerator. So the x^2 multiplies by each term in the denominator.

Can anyone remember exactly what question 3 asked?

Can anyone remember specifically what question 2 was?
Was it:
integral between bounds of pi/16 to pi/8 for (8 - cos^4x) dx or something?

Arnaud Lawrence

Original post by deadroad

That is right just in the answers the 1/x^2 in the numerator. So the x^2 multiplies by each term in the denominator.

Will I lose marks for that

Original post by Arnaud Lawrence

Will I lose marks for that

I highly doubt it. I put the same answer as well. it is technically correct just the formatting is exponential on the numerator is all.

Original post by deadroad

Can anyone remember specifically what question 2 was?
Was it:
integral between bounds of pi/16 to pi/8 for (8 - cos^4x) dx or something?

It was more like (9-6cos^2x)

Original post by ottocalladine

It was more like (9-6cos^2x)

Oh no... -.- I know where I went wrong now I wrote it down as (9 - 6cos^4(2x)).

Great.

The one where you worked out k and x, did it ask for which values of x is valid???

crap I wrote the differential of 1/x as lnx. what a rookie error

Original post by xtremespec

The one where you worked out k and x, did it ask for which values of x is valid???

Yes it did. Don't worry if you missed it out though, probably only 1 mark.

Original post by cam5morrison

crap I wrote the differential of 1/x as lnx. what a rookie error

i did this also. 5 Marks gone, was hoping for an A* but now struggling for an A :frown:

:frown:

For 10)ii) did it say that y=1/256 when x=0 and it wanted you to work out what y is when x=2? I can't figure out what mistake I made, got something ridiculous like 1/3000e^2

If you graphed the cubic for all real values of x, that should be 1/2 right???

Is 10i slightly incorrect? Should 2 and -4 not be switched around?

Original post by ottocalladine

It was more like (9-6cos^2x)

It was 9-6cos^2(4x)

Original post by nyxxllis

i did this also. 5 Marks gone, was hoping for an A* but now struggling for an A :frown:

:frown:

I think that'll be 3/5. lose the answer mark and one of the method marks, so not the end of the world

Original post by Super199

It was 9-6cos^2(4x)

Oh, in which case the integral can be rewritten as:
integral of 12 - 3cos8x correct?

Original post by Sid1234

I dont think that was any easier than June 2014 - I think 57 or 58 for an A*

I wish, more like 63 for an A*

username1967507

Original post by Samwakelin

I wish, more like 63 for an A*

it wasn't that easy haha

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