Math sequence pattern. find the variable a in pattern
2006-10-23 14:00:58 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
I think people are confused because they can't see your whole sequence and because you left out another '1'. If they could see it, they would recognize it instantly as the Fibonacci sequence.
You sequence should be:
... a, b, c, d, 0, 1, 1, 2, 3, 5, 8 ...
Notice how each number is the sum of the prior two... (0 + 1 = 1, 1 + 1 = 2, 1 + 2 = 3, 2 + 3 = 5, 3 + 5 = 8, etc.)
The easiest way to figure 'a' is to work backwards
d + 0 = 1
d = 1
c + d = 0
c + 1 = 0
c = -1
b + c = d
b + -1 = 1
b = 2
a + b = c
a + 2 = -1
a = -3
So your answer is -3.
Note: this is the Fibonacci sequence, just taken back to a few earlier terms...
2006-10-23 14:08:18 · answer #1 · answered by Puzzling 7 · 0⤊ 0⤋
-4 I think it seems 2 b a gp with d=1
2006-10-23 21:02:51 · answer #2 · answered by Anonymous · 0⤊ 0⤋
-4
2006-10-23 21:09:14 · answer #3 · answered by JT 1 · 0⤊ 0⤋
-4
2006-10-23 21:02:05 · answer #4 · answered by jacquimaddi 3 · 1⤊ 0⤋
-4 becuz.. -4,-3,-2,-1,0,1,2,3,4,5
2006-10-23 21:08:44 · answer #5 · answered by Sassy**** 1 · 0⤊ 0⤋
...
it's counting by one.
...can you count by one?
2006-10-23 21:02:15 · answer #6 · answered by Araya Starshine 3 · 0⤊ 0⤋