Help ! MAth Nov 08 P4 , A Stupid Sequence Problem !

[A.W.H]

Hey Guys , I found a stupid sequence problem which needs alot of thinking

Download Here http://www.xtremepapers.net/CIE/index.p ... _qp_04.pdf

The Last Question , Question 10 .

 

[PlanetMaster]

Which part are you talking about?

 

[A.W.H]

The last part (c)

I'm Not CONVINCED

 

[Pierre Samy]

are you too lazy that u cant wrtie or copy paste the question while you want us to open the link for you
planetmaster remind me of not answeer any thing to him

 

[PlanetMaster]

are you too lazy that u cant wrtie or copy paste the question while you want us to open the link for you
planetmaster remind me of not answeer any thing to him

Come on we are here to help and that's exactly what I'm going to do.

The last part (c)

Its a simple 'Arithmetic Progression'.
Use the formula for sum of terms:
S = (n/2) * [2a + (n-1)d]
S = (n/2) [2 + 2(n-1)]
S = n²

Clear?

 

[A.W.H]

are you too lazy that u cant wrtie or copy paste the question while you want us to open the link for you
planetmaster remind me of not answeer any thing to him

Ok Pierre

Here is The " Copied" Question , Just Show Me Ur Muscles :ugeek: :mrgreen:


10

1 + 2 + 3 + 4 + 5 + ……………………………. + n = n(n-1)/ 2


(a) (i) Show that this formula is true for the sum of the first 8 natural numbers.
(ii) Find the sum of the first 400 natural numbers.

(b) (i) Show that 2 + 4 + 6 + 8 + ………………... + 2n = n(n + 1). [1] (ii) Find the sum of the first 200 even numbers. (iii) Find the sum of the first 200 odd numbers.

(c) (i) Use the formula at the beginning of the question to find the sum of the first 2n natural numbers.

(ii) Find a formula, in its simplest form, for 1 + 3 + 5 + 7 + 9 + …………………... + (2n – 1). Show your working.

 

[A.W.H]

are you too lazy that u cant wrtie or copy paste the question while you want us to open the link for you
planetmaster remind me of not answeer any thing to him

Come on we are here to help and that's exactly what I'm going to do.

The last part (c)

Its a simple 'Arithmetic Progression'.
Use the formula for sum of terms:
S = (n/2) * [2a + (n-1)d]
S = (n/2) [2 + 2(n-1)]
S = n²

Clear?

Thank U P.M , I totally Got it

 

[waleedsmz]

Is this sum rule included in the syllabus? It's the first time for me to see it!

 

[Pierre Samy]

are you too lazy that u cant wrtie or copy paste the question while you want us to open the link for you
planetmaster remind me of not answeer any thing to him

Come on we are here to help and that's exactly what I'm going to do.

The last part (c)

Its a simple 'Arithmetic Progression'.
Use the formula for sum of terms:
S = (n/2) * [2a + (n-1)d]
S = (n/2) [2 + 2(n-1)]
S = n²

Clear?

planetmaster you are right thats why if u see my posts are all answerring or question rarely a thanking post
but some times it comes to a limit to help people who comes now a days after 2 years of learing and rember that they didnt study the easist topics in the syllabus.
any way i have to help me but help already given so no need. sorry for that...