Qualification > Reference Material

Math Paper 4

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Aayesha:
oh okay. Thanks  :)

diva_sparkles:

--- Quote from: ismailb_1993 on May 18, 2010, 03:09:11 pm ---thanks alot!!! thats really helpful!!


--- End quote ---

no actualy this is used whn there is a common difference!!
otherwise u hv to find someother way 2 do it

Saavya:
'Changing Difference' Sequences

The general term for term number 'n' , common diff. 'd' , first term 'a' and difference change 'c'is:

a+d(n-1)+c/2(n-1)(n-2)

i cant remember this one its long and u have to solve so many steps in order to reach the nth term

eg. find the nth term of 5, 7, 10, 14, 19 ........

remembering that the nth term is given by:

        1st term, 'a' =5

        first difference 'd' = 2

        difference increase 'c' = 1

replace and see what u get

i will only rely on my brain for this one

Saavya:

--- Quote from: ismailb_1993 on May 18, 2010, 03:09:11 pm ---thanks alot!!! thats really helpful!!


--- End quote ---


ur welcome :)

Saavya:

--- Quote from: diva_sparkles on May 18, 2010, 03:15:26 pm ---no actualy this is used whn there is a common difference!!
otherwise u hv to find someother way 2 do it

--- End quote ---


the other way is to use yer brain im goin 2 do that for the changing difference ones :(

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