Qualification > Math
IGCSE MATHS Doubts
haris94:
--- Quote from: ksitna on May 18, 2010, 10:12:22 pm ---okie
i hate simlifying so im sorry it took a while :/
i got the same thing as u so i must have done somat wrong but wait lemme check again.
--- End quote ---
k Thanks
ksitna:
--- Quote from: ~VIN1094~ on May 18, 2010, 10:07:05 pm ---i see u;ve answered them ..
--- End quote ---
lol sorry....
right and i have no idea what i did wrong VIN help!!!
haris94:
--- Quote from: ~VIN1094~ on May 18, 2010, 10:11:31 pm ---number 'n' , common diff. 'd' , first term 'a' and difference change 'c'is:
a+d(n-1)+c/2(n-1)(n-2)
try this wat was the sequence By the way ??
--- End quote ---
yea thats the formula i used
sequence is
4, 12, 24, 40...........
ksitna:
so haris did it work?
ksitna:
i got 2n2+2n-4
did i do it wrong?
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