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Edexcel C2 20th May 2015 Official Thread

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Reply 140

Medicjug

Hey guys,

I'm retaking I got 80 in this paper the summer before last. Any tips on getting into the 95-100 bracket

Reply 141

gdunne42

Original post by clcrlo1

Guys do we need to know the ambiguous sine rule?

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yes

Reply 142

Kevin De Bruyne

Original post by Medicjug

Hey guys,

I'm retaking I got 80 in this paper the summer before last. Any tips on getting into the 95-100 bracket

Practice difficult questions, do a bit of revision on the topics that you won't have seen in C3/C4, and it shouldn't be too difficult.

Reply 143

frozo123

Original post by SeanFM

Practice difficult questions, do a bit of revision on the topics that you won't have seen in C3/C4, and it shouldn't be too difficult.

can I expand using the c4 binomial? apparently if you get it wrong using this method you get 0/4? :eek:

Reply 144

Anon_98

Original post by Columbo97

OMG yes probability is more eww than a nappy :L Apart from that xD

Hahhahaahah wooh!! Glad we are in agreement.

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Reply 145

TeeEm

Original post by Medicjug

Hey guys,

I'm retaking I got 80 in this paper the summer before last. Any tips on getting into the 95-100 bracket

saves me to retype... This is from an earlier post (copy and paste)

do all past EDEXCEL papers
do all past EDEXCEL practice papers
all solomon papers
all Elmwood Papers,
all IYGB papers
all Delphis Papers
all ZigZag papers
(have I missed anybody?)

Just Joking

(edited 8 years ago)

Reply 146

rachelw785

Original post by MayeenH

Well you differentiate the function. Make the differential equal to 0 as a turning point has a gradient of 0, and find out your x coordinate
To find out whether it is a maximum or minimum, differentiate the differential
Sub in your x value and if it is greater than 0 it is a minimum and if it is less than 0 it's a maximum
and to find your y value, just sub in x to f(x)
If you're asking how to remember well just remember that method
And specifically for remembering when it's a max or min
If it's less than 0 it means it has to be a maximum as nothing can go over 0 vice versa
(This is for my revision btw that's why I typed out the whole method)

Oh thats great! Thank you so much :smile:

!!!

Reply 147

rachelw785

Original post by alishab97

If the second derivative is negative, then it is a maximum point (think of a sad face like a -x^2 graph) and it it's positive then it's a minimum point so the graph looks like a smiley face. Negative- sad face, positive- smiley face is how i remember it.

Oh thats really cool! I can easily remember silly things like that, so this should be really helpful! :biggrin:

Reply 148

Anon_98

Original post by TeeEm

Oh my gosh lol, pls stop with the pictures..😂😂😂😂

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Reply 149

TeeEm

Original post by Anon_98

Oh my gosh lol, pls stop with the pictures..😂😂😂😂

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he comes handy if you need to crack a beer bottle open!
(On second thought you wouldn't drink the beer after!)

Reply 150

magpiemad

http://www.examsolutions.net/

Reply 151

TrentL

Original post by studentwiz

can someone help me with this

Reply 152

sabhines

Original post by Anon_98

Wooh!- your welcome lol.

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it was 60 last year for c2 and 64 for c1 :smile:

Reply 153

Kevin De Bruyne

Original post by frozo123

can I expand using the c4 binomial? apparently if you get it wrong using this method you get 0/4? :eek:

I'm not sure - perhaps it's best to stick to the C2 method.

Reply 154

TheThugSlug

I need to do better in C2 than C1, ****

I don't even know why I did badly in C1, I thought I was prepared and now I've ruined everything

Reply 155

Anon_98

Original post by TeeEm

he comes handy if you need to crack a beer bottle open!
(On second thought you wouldn't drink the beer after!)

Haha, and didn't realise you were participating in that thread. :wink:

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Reply 156

dominicwild

Original post by frozo123

can I expand using the c4 binomial? apparently if you get it wrong using this method you get 0/4? :eek:

You can do that. I don't see why you would though? Seems like a lot more unnecessary number crunching when you can use the regular method.

I don't think you'd get instantly 0/4? Depends how the marks are awarded. I'd assume you'd get at the very LEAST one method mark. From there it's usually marks away for a term by term basis. Correct term for x, x squared and cubed. And also, if the question states give them simplified, it's a mark for doing that too. So a lot of marks do depend on getting correct answers.

Reply 157

rxns_00

Original post by imran_

Guys do you think change of base log questions would come up, since they've never been asked?

I kinda doubt it because you'd probably be able to do it on the calculator without the method itself and just write down the answer. I'd still learn the actual method though just in case because edexcel seems to be pissing us about a little

Although logs in general are very likely to come up so is revise those too 👍🏻

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Reply 158

particlestudent

Am I the only one that thinks not revising for C1 is more of a disaster than not revising for C2?

Reply 159

imnoteinstein

Guys! I need help :/
okay so for example we end up with;
sinx= -3/4
so
x = -48.6
and the range is 0 <x <360
what am i supposed to do now to get the 2 positive values of x? :redface: