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Edexcel A2 C3 Mathematics 12th June 2015

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Original post by randlemcmurphy
For U , this is t years after 1990, and for V it is t years after 2000, you need to alter it, other than that I have got as far as you.


well spotted
If tan(x)=1/0 ie infinity, does x equal 90, 270 etc...

(I ask this as I have seen it before on an exam paper but would like further confirmation?)
Reply 1362
Avatar for emi124
emi124
i got 2044 first but isn't the t s different
Original post by samb1234


it is:smile:
Original post by TeeEm
it is:smile:


I really should have read it more carefully in the first place. Had some filthy equation before I realised what the value of A and B were haha.

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Original post by samb1234
I really should have read it more carefully in the first place. Had some filthy equation before I realised what the value of A and B were haha.

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post your working :biggrin:
Original post by TeeEm
well spotted


This is as far as I am. Have two equations in terms of p and 'altered' t which I can set equal to each other.
Original post by BlueReptiles
this is my attempt
imgur.com/Q0OOTZp
sorry for the scrumpled back of a c4 paper haha


Wouldnt you put t as 10 in the U equation and not t+10? or would it be t-10

confused.:colone:
Original post by Gilo98
This is as far as I am. Have two equations in terms of p and 'altered' t which I can set equal to each other.


You can work out p, read the first two lines.
Original post by samb1234


got 2044 too ? is that correct tee em ?
Original post by randlemcmurphy
You can work out p, read the first two lines.


god I just misread to whole Q. Thought the modelling equation was for price after 2010. Now that I realise this is makes all workings before void
Original post by Maths degree
got 2044 too ? is that correct tee em ?


H said yes before, so its correct!

btw did you put t-10 in equations U's t when you equated them or put it 10.
Sorry I am teaching again ...
full solution at 20.30
redid it while actually reading the second stamps modelling equation and got 2044
minor slip up that totally wont happen tommorow:colondollar:
Original post by suyoof123
H said yes before, so its correct!

btw did you put t-10 in equations U's t when you equated them or put it 10.


put t+10 into U to match the starting year with V of 2000. then equate
Original post by suyoof123
post your working :biggrin:


Only if TeeeM doesn't mind

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can anyone give me hardest C3 edexcel past paper please
Original post by samb1234
Only if TeeeM doesn't mind

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Why would he mind, saves him the time to upload n stuff :colone:
Original post by Maths degree
put t+10 into U to match the starting year with V of 2000. then equate


Thanks mate :smile:
DSC_0080.jpg
as somebody else has said when the denominator=0 there is an asymptote. So create an equation and solve for x. This value of x = beta. I've posted my solution if it helps, also is there a mark scheme for this?

Original post by gcsestuff
Teeeeeeeeeeeem I don't understand b of this question, how does it equal zero for a vertical asymptote 😭😭ImageUploadedByStudent Room1434030481.522197.jpg


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