Question

What type of sequence is this?

2 , 3, 5, 8, 12


Arithmetic, geometric or neither

Answer 1

it definitely not an arithemetic progression nor a geometric progression
take the come difference of an
Ap and the ratio of a G.P
Ap=3-2=1
gp=3/2
Ap=5-3=2
Gp=5/3
does it make any sense.....aren't they supose to yield the same result?????.

Answer 2

Neither arithmetic nor geometric,
but there is a nice pattern.
We can write it as a recursive formula.

term(n) = term(n-1) + n, n>1, term(1) = 2

Answer 3

Neither. Each number in the sequence is obtained by adding 1,2,3,4. So,

2 + 1 = 3
3 + 2 = 5
5 + 3 = 8
8 + 4 = 12