2006-10-19 03:02:24 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
it is not a sequence therefore for this there is no nth formula
2006-10-19 03:04:18 · answer #1 · answered by shagun 2 · 0⤊ 2⤋
It's the Fibonacci sequence: 2 - 3 - 5 - 8 - 13 - 21 - 34 - 55 - 89 - 144 .......
You get each number, adding the 2 before...
2 + 3 = 5
3 + 5 = 8
5 + 8 = 13... and so on...
The nth : 89
2006-10-19 03:15:50 · answer #2 · answered by rocy_77 2 · 0⤊ 0⤋
The nth term formula for the above sequence is n = (n - 1) + (n - 2)
2006-10-19 04:39:07 · answer #3 · answered by aazib_1 3 · 0⤊ 0⤋
This is the Fibonacci sequence which has the closed form:
F(n) = (f^n - (1-f)^n ) / sqrt(5), where f=1/2 + 1/2 sqrt (5) = golden ratio.
2006-10-19 03:20:22 · answer #4 · answered by cordefr 7 · 0⤊ 0⤋
If a the nth number and b the number before in the series then a=b/1.61
2006-10-19 09:06:02 · answer #5 · answered by Mathew C 5 · 0⤊ 0⤋
This is the Fibonacci sequence. It's ubiquitous.
2006-10-19 03:05:03 · answer #6 · answered by jack b 3 · 0⤊ 0⤋
its most easily defined recursively by the difference formula:
u_n=u_(n-1)+u_(n-2)
where u_n is the nth term.
2006-10-19 03:08:05 · answer #7 · answered by tsunamijon 4 · 0⤊ 0⤋
If this is your homework, there are 2 rules. One, either you add to the next digit by one higher than you have added to the previous digit, or you add to the next digit the digit behind it.
2006-10-19 03:06:29 · answer #8 · answered by Anonymous · 0⤊ 0⤋
fn = [((1 + (51/2))/2)n + ((1 - (51/2))/2)n] / (51/2)
2006-10-19 03:05:35 · answer #9 · answered by Brian L 7 · 0⤊ 0⤋
12,17,23,30,38
it is 38
ht
2006-10-19 03:04:25 · answer #10 · answered by Henry_Tee 7 · 0⤊ 0⤋