math C1 doubt

[halosh92]

  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

[staceyboy3]

 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

[vanibharutham]

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

[vanibharutham]

(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

[halosh92]

(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 ?

[halosh92]

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 

[vanibharutham]

The iterative formula was given to us

x_n+1= x_n(p +x_n)

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

[halosh92]

The iterative formula was given to us

x_n+1= x_n(p +x_n)

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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[astarmathsandphysics]

Please seed

[staceyboy3]

i downloaded al myl pastpapers from freetextbooks.com
it comes as a whole package with all papers, the more the marrier 

Wow thanks!

Useful site, thanks again

[astarmathsandphysics]

Thousands of papers with a few clicks and textbooks too but please seed.

[halosh92]

Thousands of papers with a few clicks and textbooks too but please seed.

am new here, how do we exactly seed?

[Blood0cean]

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
 

[astarmathsandphysics]

Def some on freeexampapers

[halosh92]

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
 

i only have edexcel for these papers ..u want them??