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Author Topic: C4 Guesses!  (Read 3491 times)

Offline theman

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C4 Guesses!
« on: June 14, 2009, 10:17:38 pm »
Hey Guys,

The C4 exam is tommorow anyone have any guesses?

Tips advice, everything is welcome!
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Offline Hwa1

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Re: C4 Guesses!
« Reply #1 on: June 14, 2009, 10:32:46 pm »
related rates of change, partial fractions, volumes of revolution, vectors, INTEGRATION
its always the same :P
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Offline theman

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Re: C4 Guesses!
« Reply #2 on: June 14, 2009, 10:39:56 pm »
Binomial expansion?

Wut bout dat?
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Offline theman

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Re: C4 Guesses!
« Reply #3 on: June 14, 2009, 10:41:08 pm »
Nd vectors!
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Offline Hwa1

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Re: C4 Guesses!
« Reply #4 on: June 14, 2009, 10:47:15 pm »
binomial xpansion is easy :P
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Offline astarmathsandphysics

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Re: C4 Guesses!
« Reply #5 on: June 14, 2009, 10:48:23 pm »
Binomial exapnsion is not in c4
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Offline theman

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Re: C4 Guesses!
« Reply #6 on: June 14, 2009, 10:52:22 pm »
Integration and Related Rates of change are the hard ones!

And @astarmathsandphysics, Binomail expansion is chapter 3!
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Offline astarmathsandphysics

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Re: C4 Guesses!
« Reply #7 on: June 14, 2009, 10:53:18 pm »
Is it in cie a level?  Not in ocr/edexcel/aqa
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Offline theman

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Re: C4 Guesses!
« Reply #8 on: June 14, 2009, 10:55:10 pm »
In edexcel...

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Offline Hwa1

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Re: C4 Guesses!
« Reply #9 on: June 14, 2009, 10:59:10 pm »
yeh i agree
integration can get really anoying sometimes
related rates of change are OK SOMETIMES, but usualy a pain in the A**

i jst hope for partial fractions we jst have to do a nice simple cover-up rule :)
i dont want a sort of
a + bx + c/(something) + d/(something else)

or watevr..
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Offline motherheaven

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Re: C4 Guesses!
« Reply #10 on: June 14, 2009, 11:16:00 pm »
c3 paper was pretty easy .so i have some feeling that c4 paper will be very tough
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Offline Hwa1

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Re: C4 Guesses!
« Reply #11 on: June 14, 2009, 11:27:29 pm »
thats wat i was thinkin 2, plz dnt remind me lol
id rather it was the other way round tbh...because a 'hard' c3 is still easy.

guys if u got
ln A = B + ln C
and u wna get rid of the ln's by doin the thing with e
do u do it to the left and right sides as a whole or seperate?
like will it be:
 A = e^B + C
OR
 A = C x e^B
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Offline motherheaven

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Re: C4 Guesses!
« Reply #12 on: June 14, 2009, 11:31:37 pm »
it will be
ln A = B + lnC
ln A - ln C =B
ln ( A / C ) = B
    A/C = e^B
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Offline Hwa1

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Re: C4 Guesses!
« Reply #13 on: June 14, 2009, 11:34:51 pm »
thanks
meh, there was a Q in c3 where we had to factorise something with e's
but i almost fell asleep and startin takin ln's, but that was wrong too because i was doin it to the stuff singularly rather than the sides as wholes...that sucks, 90% in c3 or sumfin im guessin.. :(
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Offline theman

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Re: C4 Guesses!
« Reply #14 on: June 14, 2009, 11:35:16 pm »
@motherheaven

Yea thts true C3 was pretty easy so they may kill us in C4.

But My S1 was great and C3 too, so hopefully they ll make up!

@Hwa1

B=lnc-lna

B= ln (c/a)

e^B=c/a

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