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Edexcel A2 C3 Mathematics 12th June 2015

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What did people get for part b of question 10 (the vectors one) ?? I got root13

Original post by xKay

Its actually increasing

did you have to say if it was a min or max ?

Original post by Ripper Phoenix

increasing! K was negative in bold!

i worked out second deriative and left it :/
1 mark?

Original post by MrBowcat

Just like the paper, the hitler video is also moderately s****.

https://www.youtube.com/watch?v=RTkQ4El5epk

that video is private i cant access it

Original post by TheFuhrer

its definitely decreasing :biggrin:

:biggrin:

:biggrin:

I put decreasing by mistake.
its increasing cause K is negative, so it would give you a derivative which is overall positive, the derivative=gradient, if derivative>0 then its increasing

VOTE AT
http://www.thestudentroom.co.uk/showthread.php?t=3399381

Original post by Ripper Phoenix

increasing! K was negative in bold!

Agreed. Definitely increasing.

I swear there were only 8 questions??

The fish inspect

Original post by shashapop

I forgot the asymptote too :frown:

:frown:

I did the asymptote on the wrong axis. It's only one mark anyway

About the asymptote - http://www.wolframalpha.com/input/?i=y%3D%282e%5Ex%29-5

See the range, it should be y=-5 for f(x) and y=5 for |f(x)|

Original post by Maham88

did you have to say if it was a min or max ?

no the question asked whether it was an increasing or decreasing function and why

Let me just but this here, that paper was an absolute mind****

I got 86% UMS average at AS maths

and now I dont even think im going to get an A because

this paper was awful for many parts I couldnt even provide an answer so heartbreaking

all my effort I done all the past papers, I wasnt full ready because I knew they would **** us up, but this bad damn :frown:

:frown:

I have honestly ruined my life by not doing solomons

Original post by Ripper Phoenix

Cross multiply to get tanx=-1/3 and solve to get 2 answers common its just 4 marks :smile:

:smile:

FFS why did I not see this! so straight forward. so annoyed with the exam!

Original post by Maham88

did you have to say if it was a min or max ?

Nope

Original post by at55555555

]
100% it was increasing from a negative and tending towards 0

increasing because x was positive and the denominator will always be positive too since its squared in the derivative

Original post by TeeEm

I am dying to see this trig identity ...

There you go. :biggrin:

:biggrin:

Die no more.

did any one get 4 solutions for the trig questions where 2(theta)- 26... = 77 degrees, or something? i put two solutions, how many marks lost?

http://www.thestudentroom.co.uk/showthread.php?t=3399451

The number of questions in the paper is always on the front page - in a column on the right hand side.

Always check this before you begin the exam!

Original post by CalebS5

I swear there were only 8 questions??

9 for regular C3. Last question involved fractions, quadratics and k.

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