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Author Maths help :(
groom
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25th Jan 04 at 21:18   View User's Profile U2U Member Reply With Quote
what is the n th therm rule and how would i work it out for the sequence

3 9 19 33



[Edited on 25-01-2004 by groom]
James@CCC
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25th Jan 04 at 21:20   View User's Profile U2U Member Reply With Quote
work out the difference between each of the numbers, and then work out the differnce between these.

then take one away from other and do it again.

i no wot i mean, ill do it for ya...
James@CCC
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25th Jan 04 at 21:21   View User's Profile U2U Member Reply With Quote
2n(squared) +1
groom
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25th Jan 04 at 21:23   View User's Profile U2U Member Reply With Quote
ty
groom
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25th Jan 04 at 21:24   View User's Profile U2U Member Reply With Quote
aint it 2n(2) - 1
dousey
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25th Jan 04 at 21:24   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by corser
2n(squared) +1

that aint right is it?
groom
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25th Jan 04 at 21:24   View User's Profile U2U Member Reply With Quote
its -1
Ian
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25th Jan 04 at 21:26   View Garage View User's Profile U2U Member Reply With Quote
The nth term rule is the one you can put any value of n in and it'll give you the number at that place in the sequence.


[Edited on 25-01-2004 by Ian]
ChazSXi
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25th Jan 04 at 21:27   View User's Profile U2U Member Reply With Quote
pmsl i remember doin this in year 9
groom
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25th Jan 04 at 21:29   View User's Profile U2U Member Reply With Quote
done it neway. if its wrong, its wrong
James@CCC
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25th Jan 04 at 21:32   View User's Profile U2U Member Reply With Quote
the squared in on the n, not 2n. that woulda been clearer if i had a squared key
James@CCC
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25th Jan 04 at 21:33   View User's Profile U2U Member Reply With Quote
2nē+ 1

found it, good old character map
Mase
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25th Jan 04 at 21:33   View Garage View User's Profile U2U Member Reply With Quote
the answer is

2n^2+1

^2 - meaning squared !!

Mase
Mase
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25th Jan 04 at 21:34   View Garage View User's Profile U2U Member Reply With Quote
bugger u beat me 2 it !!!!

Mase
James@CCC
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25th Jan 04 at 21:34   View User's Profile U2U Member Reply With Quote


[Edited on 25-01-2004 by corser]
groom
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25th Jan 04 at 21:38   View User's Profile U2U Member Reply With Quote
that dfont work aint it 2n^2 -1
James@CCC
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25th Jan 04 at 21:40   View User's Profile U2U Member Reply With Quote
1 sqaured = 1
1x2 = 2
2+1= 3

2 sqaured = 4
4x2 = 8
8+1 = 9

etc...

trust me people!
groom
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25th Jan 04 at 21:41   View User's Profile U2U Member Reply With Quote
OH SHIT u do indices then multiplication :@ fuck
James@CCC
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25th Jan 04 at 21:42   View User's Profile U2U Member Reply With Quote
yup, BODMAS!!
Trucido
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25th Jan 04 at 21:46   View User's Profile U2U Member Reply With Quote
so you mean 2(nē) + 1
waynep
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25th Jan 04 at 21:46   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by ChazSXi
pmsl i remember doin this in year 9


i remember too im so glad i have forgotton all of this day after exam it was like it never existed !
groom
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25th Jan 04 at 21:48   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Trucido
so you mean 2(nē) + 1


Brackets
Indices
Division
Multiplication
Addition
Subtraction
James@CCC
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25th Jan 04 at 22:00   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Trucido
so you mean 2(nē) + 1


yea, but theres no need for the brackets. order and then multiply

 
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