IGCSE/GCSE/O & A Level/IB/University Student Forum
Qualification => Subject Doubts => GCE AS & A2 Level => Math => Topic started by: halosh92 on December 03, 2009, 08:09:10 pm
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hello , its a silly 1 mark question but i just dont get it:
maths edexcel
C1
2008 JAN
Q6 part c
and one more question:
2008 jan
Q 7 part d
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hello , its a silly 1 mark question but i just dont get it:
maths edexcel
C1
2008 JAN
Q6 part c
and one more question:
2008 jan
Q 7 part d
Where do you get edexcel past papers? I wanna see the question :)
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The maximum point on the curve with equation y = f(x + a) is on the y-axis.
(c) Write down the value of the constant a.
You can see that the maximum point on f(x) is at (2,5)
However, the question states that the maximum value of f(x+a) is on the y-axis, so we need to apply some transformation to f(x) to allow it to reach the y-axis...
Quite simply, a = 2
because f(x+2) moves f(x) 2 units to the left
and hence the maximum will be on (0,5) which is on the y axis :)
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(d) write down the value of x2008.
First thing, dont freak out if u see some huge number like that, because thats exactly what they want u to do, but there is a trick.
From part (c) you should have deduced that p = -1.5
Now the way i would do this is as follows:
Using the iterative formula, i would x2, x3, x4 and so on
Hence,
x1 = 1 (given)
x2 = -0.5
x3 = 1 (given)
x4 = -0.5
See the pattern?
All evens are -0.5
and all odds are 1
Hence, x2008 = -0.5
:)
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(d) write down the value of x2008.
First thing, dont freak out if u see some huge number like that, because thats exactly what they want u to do, but there is a trick.
From part (c) you should have deduced that p = -1.5
Now the way i would do this is as follows:
Using the iterative formula, i would x2, x3, x4 and so on
Hence,
x1 = 1 (given)
x2 = -0.5
x3 = 1 (given)
x4 = -0.5
See the pattern?
All evens are -0.5
and all odds are 1
Hence, x2008 = -0.5
:)
thankx alot that was very gd,
but ummm i have one question, i never took this formula :"iterative formula"
do we always multiple by1, 2, 3, 4 in all cases ????
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Where do you get edexcel past papers? I wanna see the question :)
i downloaded al myl pastpapers from freetextbooks.com
it comes as a whole package with all papers, the more the marrier :P
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The iterative formula was given to us :)
xn+1= xn(p +xn)
when n = 0, we get a value for x1 = 1 (given)
when n = 1, we get a value for x2 => x1(p + x1)
==> p + 1
when n = 2, we get a value for x3 => x2(p + x2)
==> (p+1)( p + p + 1)
==> ( p + 1 ) ( 2p + 1 ) => 2p²+3p+1
and so on
and we found a value for p = -1.5
now , using that value
we can find
x1 = 1
x2 = -1.5 + 1 => -0.5
x3 = 1
x4 = -0.5
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The iterative formula was given to us :)
xn+1= xn(p +xn)
when n = 0, we get a value for x1 = 1 (given)
when n = 1, we get a value for x2 => x1(p + x1)
==> p + 1
when n = 2, we get a value for x3 => x2(p + x2)
==> (p+1)( p + p + 1)
==> ( p + 1 ) ( 2p + 1 ) => 2p²+3p+1
and so on
and we found a value for p = -1.5
now , using that value
we can find
x1 = 1
x2 = -1.5 + 1 => -0.5
x3 = 1
x4 = -0.5
thankyou!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ;D ;D ;D ;D ;D
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Please seed
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i downloaded al myl pastpapers from freetextbooks.com
it comes as a whole package with all papers, the more the marrier :P
Wow thanks! :)
Useful site, thanks again ;D
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Thousands of papers with a few clicks and textbooks too but please seed.
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Thousands of papers with a few clicks and textbooks too but please seed.
am new here, how do we exactly seed????
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this got nothing to do with the topic but im doing a levels CIE and i cant find any CIE passpapers online for statistics..
its really bumming me out . If some 1 has an answer to that id apperitiate it if u helped.
Im doing 1st year A levels Math.
im gonna be doing Pure math paper 1 and Statistics paper 1
S1 P1
:-X
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Def some on freeexampapers
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this got nothing to do with the topic but im doing a levels CIE and i cant find any CIE passpapers online for statistics..
its really bumming me out . If some 1 has an answer to that id apperitiate it if u helped.
Im doing 1st year A levels Math.
im gonna be doing Pure math paper 1 and Statistics paper 1
S1 P1
:-X
i only have edexcel for these papers ..u want them??
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am new here, how do we exactly seed????
You use some sort of bittorent client, right? :) After you download something, you simply leave it alone. In the client it should have a green arrow pointing up next to the download. Leaving the client open will seed the downloaded content, so that in a sense you upload it to someone else who is downloading... :)
This is how torrents work, by sharing files and helping others download them.
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You use some sort of bittorent client, right? :) After you download something, you simply leave it alone. In the client it should have a green arrow pointing up next to the download. Leaving the client open will seed the downloaded content, so that in a sense you upload it to someone else who is downloading... :)
This is how torrents work, by sharing files and helping others download them.
okek ill try doing that now thx!! ;D
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utorrent is the best.
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utorrent is the best.
Agreed :)
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utorrent is the best.
me agree 2 its rili awesome!!!!