Posted by **julian ** on Tuesday, March 22, 2011 at 4:57pm.

the numbers below are Fibonacci numbers.

1,1,2,3,5,8,13,21,34,55,...

write a rule for the pattern. what are the next three numbers?

- MATH -
**Reiny**, Tuesday, March 22, 2011 at 5:02pm
F(1) = 1

F(2) = 1

F(n) = F(n-1) + F(n-2), n > 2, n is an element of N (natural numbers)

so next two numbers .... 89, 144 , 233

- MATH -
**julian **, Tuesday, March 22, 2011 at 5:09pm
the rule??????????????????

- MATH -
**julian **, Tuesday, March 22, 2011 at 5:11pm
plus I'm in 4th grade

- MATH -
**Reiny**, Tuesday, March 22, 2011 at 5:14pm
ok, in words ...

"to get the next number, add up the two previous ones"

e.g. 5+8 = 13

21+34 = 55

etc.

BTW, to type " the rule ??????????? " is not the most polite way for a 4th grade to ask for help.

- MATH -
**julian **, Tuesday, March 22, 2011 at 5:33pm
sorry

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