Edexcel C4 June 2014- OFFICIAL THREAD

Original post by Hoshil

Now since you people have warmed up with a few previous integration question its time for some killers!

Whoever gets the right answer, he/she should not worry for the C4 exam as he/she is bound to get 90+ UMS

Here it is:

Q1) Integral e^(3x) Cos (2X)
Q2) Integral e^(2x) Cos (x)

There are no limits in the questions.
Give your answers as simplified as possible.

Actually just send an attachment of your working. I have got the two questions correct after 15 minutes of intense calculations and cancellations. If you give up then PM me and I will send an attachment of the workings. Also PM your answers so as to not ruin the fun of C4 integration!

Vector questions coming up shortly!

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Hint please, integration by parts?

Reply 182

Original post by jtbteddy

Hint please, integration by parts?

IBP and then add the integral back on and divide

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Reply 183

ahiseni

1

Guys how do you integrate to check your answers using the Casio fx9913es Plus? I went and bought one today; very interested in figuring out this 'double-check' method I've been hearing too much about - thanks in advance..

Reply 184

Original post by Arithmeticae

IBP and then add the integral back on and divide

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ImageUploadedByStudent Room1401118738.154942.jpg

Not looking good :frown:

Reply 185

Original post by jtbteddy

Not looking good :frown:

That's fine, then you just add your integral over to the other side and divide through :smile:

Reply 186

tom32

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Made a lot of mistakes on my first attempt. Great question though!

1401121247547.jpg69.0KB

Reply 187

Original post by Arithmeticae

That's fine, then you just add your integral over to the other side and divide through :smile:

ImageUploadedByStudent Room1401121432.725033.jpg

Thank you, excellent question

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(edited 9 years ago)

Reply 188

ImageUploadedByStudent Room1401122173.218547.jpg

Reply 189

shakeeb07

Original post by jtbteddy

Thank you, excellent question

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Original post by jtbteddy

nice one teddy, thanks for the solutions :smile:

Reply 190

precious maro

12

what do you guys think Is the most challenging topic in c4? haven't finished vectors and would not have time to finis it until two days before the exam. the A2 exams are cramped this year, all In 2 weeks

Reply 191

QuantumSuicide

Original post by precious maro

what do you guys think Is the most challenging topic in c4? haven't finished vectors and would not have time to finis it until two days before the exam. the A2 exams are cramped this year, all In 2 weeks

Rates of change

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Reply 192

Original post by precious maro

what do you guys think Is the most challenging topic in c4? haven't finished vectors and would not have time to finis it until two days before the exam. the A2 exams are cramped this year, all In 2 weeks

Vectors or connected rates of change (the ones where you have to find like 5 different derivatives :colonhash:

)

Reply 193

precious maro

12

Original post by QuantumSuicide

Rates of change

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im okay with those actually. i haven't started the 3D vectors yet but my classmates said it is difficult

Reply 194

QuantumSuicide

Original post by Arithmeticae

Vectors or connected rates of change (the ones where you have to find like 5 different derivatives :colonhash:

)

Rates of change + cones/shapes/volumes/surface area :dontknow:

Vectors + shapes :dontknow:

Reply 195

precious maro

12

Original post by Arithmeticae

Vectors or connected rates of change (the ones where you have to find like 5 different derivatives :colonhash:

)

oh i see, thanks. you dong this exam? thought you were doing gcse's?

Reply 196

Original post by QuantumSuicide

Rates of change + cones/shapes/volumes/surface area :dontknow:

Vectors + shapes :dontknow:

Those ones are so annoying, like the ones about water emptying out of stuff :angry:

I still hate anything shape related, probably my least favourite part of maths :colonhash:

Reply 197

RoyalBlue7

19

Original post by Arithmeticae

Vectors or connected rates of change (the ones where you have to find like 5 different derivatives :colonhash:

)

You're not even doing C4. :hmmm:

Reply 198

Original post by RoyalBlue7

You're not even doing C4. :hmmm:

That's what you think :holmes: