2016 Edexcel C2 Morning exam[discussion thread] Watch

X_IDE_sidf
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#101
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#101
(Original post by daria99)
Note that question 6) ii) , had 3 values, original value for x was -14.4 but you also get 14.4. You may want to check that.
No, sin was -ve and the values needed to be 0<\theta<360

\sin 14.5 \approx \frac{1}{4}
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Atiq629
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#102
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#102
(Original post by X_IDE_sidf)
No, sin was -ve and the values needed to be 0<\theta<360

\sin 14.5 = \frac{1}{4}
Got 194.5 and 345.5 for that one.
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X_IDE_sidf
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#103
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#103
(Original post by Atiq629)
Got 194.5 and 345.5 for that one.
as did I
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mnak123456
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#104
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#104
it was cruel 2wo hard math exam papers shaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaan edexcel
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Reda2
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#105
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#105
For the last question I skipped part (a) and did the other parts because the answer was in the page, would I still get the marks?
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X_IDE_sidf
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#106
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#106
(Original post by Reda2)
For the last question I skipped part (a) and did the other parts because the answer was in the page, would I still get the marks?
yes, you are the reason that the answers to those parts are written on the paper.
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eatpigeons
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#107
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#107
(Original post by stephaniecheung)
that's not the answer you forgot to put it back into the P
What are you talking about? This is for the second derivative, to check that x was a minimum
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TeeEm
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#108
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#108
http://www.thestudentroom.co.uk/show....php?t=4117033
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erfanullah
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#109
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#109
http://www.ipetitions.com/petition/a...aths-solutions

COME ON GUYS SIGN THE PETITION TO ALLOW ARSEY TO RELLEASE EDEXCEL A LEVEL MATHS SOLUTIONS YEAR ON YEAR !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!
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Aruba852
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#110
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#110
A pretty good paper thank God , except the binomial **** it went fine and made a calculater mistake when finding x in the last question. Arsey ain't doin anymore model papers too
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shayefc
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#111
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#111
can anyone remember the final calculation for solving x, question 9. I never simplified it to 17 but can't remember if my solution was the equivalent
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don't cry-craft
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#112
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#112
For the sin one, I used a CAST diagram but then I drew a graph to help double check my answers. The answers that I got was right (i think looking at what most people got), but I was wondering whether my method (especially the graph to double check) will be accepted?
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puPper
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#113
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#113
For the log question i got x = -2.19 but i had a brain fart and put that it also = 0, will i lose marks for this?
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don't cry-craft
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#114
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#114
(Original post by puPper)
For the log question i got x = -2.19 but i had a brain fart and put that it also = 0, will i lose marks for this?
How many marks was it? It's hard to say, but I think you might as it is actually not a solution. Plus the question said give your 'answer' (not answers) to 2 dp. If you're lucky they may ignore the 0.
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shayefc
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#115
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#115
can anyone recall what P was equal to in terms of x at the start of question 9c?
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X_IDE_sidf
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#116
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#116
(Original post by shayefc)
can anyone recall what P was equal to in terms of x at the start of question 9c?
http://www.thestudentroom.co.uk/show...3#post65151283

ignore me,  P= \frac{1000}{x} + \frac{x}{12}(4\pi + 36 - 3\sqrt{3})

\frac{dP}{dx} = \frac{1}{12}(4\pi +36 - 3\sqrt{3})-\frac{1000}{x^2}

\frac{d^2P}{dx^2} = \frac{2000}{x^3}
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shayefc
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#117
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#117
can anyone recall what the Perimeter was in terms of x pls
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X_IDE_sidf
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#118
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#118
(Original post by shayefc)
can anyone recall what the Perimeter was in terms of x pls
Please read
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megans98
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#119
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#119
Please could someone post/try to remember the questions!
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username2488725
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#120
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#120
Is it just me or is the mark scheme that the guy posted on this thread missing 12 marks?
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