Edexcel A2 C4 Mathematics June 2016 - Official Thread

I have attached a question, please let me know the answer. Its a very simple question. How do you know when to use ln method or normal method, where you add power then integrate.

You cant do something to the power of 0

Reply 3181

Reda2

14

What areas equation do we need to know, for example, surface area of sphere, volume of sphere, volume of cone, what else? Im talking about the differentiation questions.

Reply 3182

OldMathsAccount

2

Original post by Reda2

What areas equation do we need to know, for example, surface area of sphere, volume of sphere, volume of cone, what else? Im talking about the differentiation questions.

There really aren't many. Trapezium maybe? The surface areas are all just made of rectangles, triangles and circles as well anyway.

Reply 3183

Katiee224

11

Original post by metrize

You cant do something to the power of 0

Yes you can, anything to the power of 0 = 1

Reply 3184

J32796

1

Original post by metrize

You cant do something to the power of 0

Its to power of -1, and its linear, so we use the 1/x standard integral which is ln blah blah

Reply 3185

J32796

1

Original post by Katiee224

Yes you can, anything to the power of 0 = 1

look at question, power is -1, so its the same as the previous ln shown in attachment

Reply 3186

Yua

14

Original post by Reda2

What areas equation do we need to know, for example, surface area of sphere, volume of sphere, volume of cone, what else? Im talking about the differentiation questions.

yes

Reply 3187

J32796

1

Original post by TriggaNigga

is it possible to get 100UMS in C4

nope, 60ums is max. :colonhash:

Reply 3188

Kevin De Bruyne

21

reda2

.

It would imply that the derivative of a constant is something to the power -1.

Reply 3189

pineneedles

14

I haven't managed to do all of the past papers for C4 as I've been so busy with everything else. I'm not super worried because I feel fairly comfortable with everything but I need to be as efficient as possible tomorrow and make it as useful as possible (I have to focus on bio tonight), any suggestions as to what I should do?

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Reply 3190

hdey

1

Thought this might be useful for C4 revision.

Question spotting Edexcel Core 4.pdf168.8KB

Reply 3191

fl0werp0wer

Original post by J32796

nope, 60ums is max. :colonhash:

not true! I got 97 UMS in c4 last year! Thought I had 100 but turned out I made 1 small silly mistake in the easier questions :'(

Reply 3192

hdey

1

Original post by pineneedles

I haven't managed to do all of the past papers for C4 as I've been so busy with everything else. I'm not super worried because I feel fairly comfortable with everything but I need to be as efficient as possible tomorrow and make it as useful as possible (I have to focus on bio tonight), any suggestions as to what I should do?

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I have uploaded a pdf to show questions from previous exam papers. Dependable(?) questions: Binomial expansion, vectors, implicit differentiation, partial fractions.

Reply 3193

pineneedles

14

Original post by hdey

I have uploaded a pdf to show questions from previous exam papers. Dependable(?) questions: Binomial expansion, vectors, implicit differentiation, partial fractions.

Okay, thank you, I'll take a look :smile:

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Reply 3194

hdey

1

Original post by pineneedles

Okay, thank you, I'll take a look :smile:

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Here it is! :wink:

Question spotting Edexcel Core 4.pdf168.8KB

Reply 3195

thenextchemist

21

Original post by hdey

Here it is! :wink:

This is actually so sick man

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Reply 3196

somevirtualguy

2

Original post by pineneedles

I haven't managed to do all of the past papers for C4 as I've been so busy with everything else. I'm not super worried because I feel fairly comfortable with everything but I need to be as efficient as possible tomorrow and make it as useful as possible (I have to focus on bio tonight), any suggestions as to what I should do?

Posted from TSR Mobile

I'm in a similar position, I've done the first two Gold papers today and I'll do the third and fourth tomorrow. I only found out about them the other day before C3 and they were great for revision :smile:

Reply 3197

BrainJuice

15

Original post by somevirtualguy

I'm in a similar position, I've done the first two Gold papers today and I'll do the third and fourth tomorrow. I only found out about them the other day before C3 and they were great for revision :smile:

Thanks for teaching me about them too now.

Reply 3198

Alby1234

2

Am I being completely stupid here? I have no idea where the mark scheme is getting the limits in part b) as root 2 and 0, and also it seems they may be missing a t^2? either way I'm very confused about part b if anyone could help C4 capture 3.JPG

Attachment not found

C4 capture 4.JPG22.2KB

Reply 3199

Kevin De Bruyne

21

Original post by Alby1234

Am I being completely stupid here? I have no idea where the mark scheme is getting the limits in part b) as root 2 and 0, and also it seems they may be missing a t^2? either way I'm very confused about part b if anyone could help C4 capture 3.JPG

Attachment not found

It's the t values you're integrating between, remember. From part a you've worked out that t=0 corresponds to 'the point on the right' and t = root 2 corresponds to 'the point on the left'.

Edexcel A2 C4 Mathematics June 2016 - Official Thread

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