Edexcel C4 June 2009 Thread :) Watch

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fn_101
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#381
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#381
Eurgh, I'm so screwed. I keep getting everything wrong, from the integrations that I spent a good several hours on on Friday night to cartesian equations of a curve. Can't even attempt the rates questions. Feel so ****
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Jobomaphoy
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#382
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#382
I need a B overall... and I CAN'T DO C4!!!!!!!!!
C1 - A
C2 - A
C3 - A
M1 - B
S1 - B

Ne1 know what the minimum grade I can get on C4 is to get a B overall???
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stephie24
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#383
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#383
how would i integrate this please?? 4sin2xcos2x
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dilburt
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#384
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#384
(Original post by Jobomaphoy)
I need a B overall... and I CAN'T DO C4!!!!!!!!!
C1 - A
C2 - A
C3 - A
M1 - B
S1 - B

Ne1 know what the minimum grade I can get on C4 is to get a B overall???
probably a C or a D looking at those grades
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dilburt
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#385
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#385
(Original post by stephie24)
how would i integrate this please?? 4sin2xcos2x
by parts
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Jobomaphoy
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#386
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#386
Thanks.. my brain has literally turned to mush lol

binomial, partial fractions, integration by parts, vectors.. are all godsends though!
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Waterstorm
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#387
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#387
(Original post by stephie24)
how would i integrate this please?? 4sin2xcos2x
No, not by parts like someone else suggested. 4sin2xcos2x = 2sin4x, look back at the trig identities in C3.
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Winmore
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#388
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#388
i need 4 UMS on C4 for an A lol, altho aiming to get as high as possible.. C4 isn't actually that hard really, and if you can do integration you're pretty much sorted lol. gl to all tomorrow!
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My Alt
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#389
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#389
(Original post by Jobomaphoy)
I need a B overall... and I CAN'T DO C4!!!!!!!!!
C1 - A
C2 - A
C3 - A
M1 - B
S1 - B

Ne1 know what the minimum grade I can get on C4 is to get a B overall???
Do you know your overall UMS for each one, because that will give you a much clearer indication of exactly what you need at C4. From what you've given me I can tell you that the most you need to C4 is 40% (remember this is a very worst case scenario) and the least you could possibly need is 0. So it is possible for you to already have a B, judging by the information you have given me.

For you to get an A, this varies between 100% and 20%, which is really inaccurate, post your UMS marks so I can give you a more accurate evaluation.
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Maqdah
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#390
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#390
I'm done doing the solomon papers, bloody hell they are hard. Trying to go regular past papers to get my confidence back up
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Amz_1
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#391
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#391
FFS im getting annoyed the stupid rules we gotta learn
arghhhhhh

can someone please tell me which ones are given in the formula booklet thanks peeepsss xxxxxxxx
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Amz_1
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#392
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#392
(Original post by My Alt)
Amz_1 is a good example of the sort of mood you should be in right now!

lmfao ahaaaa!! maths is like the only thing keeping me alive

CHEM SYNOPTICCCCC AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHH

thnak god we dont hv that for mathsss :woo:
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Waterstorm
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#393
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#393
http://www.edexcel.com/quals/gce/gce...s/default.aspx

Third document.
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My Alt
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#394
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#394
(Original post by Amz_1)
lmfao ahaaaa!! maths is like the only thing keeping me alive

CHEM SYNOPTICCCCC AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHH

thnak god we dont hv that for mathsss :woo:
Maths is awesome like that. My last 4 papers are all synoptic n_n
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Amz_1
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#395
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#395
(Original post by My Alt)
Maths is awesome like that. My last 4 papers are all synoptic n_n
how disgusting. lol i had bio synoptic last week thank god it was on friday phewwww

oooo check you doing 4 subjectsss -o-o-

lol

what u doin at uniiiii
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2710
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#396
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#396
(Original post by Waterstorm)
Yeah, the formula are, but learn how to use it.
Hey, Im not so sure anymore. I just checked the Formula link, and its not there!
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R£SP£CT
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#397
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#397
(Original post by Spiderwoman)
Could anyone solve this integration by subsitution for me plz:

square root(x^2+4)/x. with u^2= x^2+4
U^2=X^2 + 4 u=sqroot(X^2 + 4)

differentiate U^2=X^2 + 4

2udu/dx= 2x
2udu=2xdx
udu=xdx
dx=udu/x


f Sqrt(X^2 + 4)/x dx normal equation

Substiute U and dx into normal equation to give

f U/x * udu/x

This simplifies u^2/x^2 du

change X^2= U^2 - 4

should end up with f U^2/(U^2 - 4) du

and integrate from there ^^
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My Alt
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#398
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#398
(Original post by Amz_1)
how disgusting. lol i had bio synoptic last week thank god it was on friday phewwww

oooo check you doing 4 subjectsss -o-o-

lol

what u doin at uniiiii
How do you know I'm doing 4 subjects? I have Physics Synoptic, RE Synoptic and STEP II / III haha, although I guess the STEPs kind of indicate that I'm doing Further Maths as well, so fair play.

If I pass STEP, I will be doing Maths with Physics at Uni, if I fail, I will be doing Physics with Theoretical Physics, yourself?
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Amz_1
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#399
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#399
(Original post by My Alt)
How do you know I'm doing 4 subjects? I have Physics Synoptic, RE Synoptic and STEP II / III haha, although I guess the STEPs kind of indicate that I'm doing Further Maths as well, so fair play.

If I pass STEP, I will be doing Maths with Physics at Uni, if I fail, I will be doing Physics with Theoretical Physics, yourself?

silllyyyy your not gonna do a synoptic twice for one subject are you now?! lol i used my logic 8) aha neek.

ouchhh physics killed me at gcse i got a B for it

im gona be doin accounting and finance
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Char56
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#400
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#400
I got an A on my 18th past paper! I've finally hacked it!
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