Question

What is the sum of the first 12 terms in the Fibonacci Sequence?

Term 1 2 3 4 5 6 7 8 9
Fibonacci Number 1 1 2 3 5 8 13 21 34

Answer 1

add them all ...

Answer 2

if i recall correctly you can compute \(f_{14}-1\)

Answer 3

what does that mean? 0.o

Answer 4

in fact i am sure of it

Answer 5

the 14th fibonacci number

Answer 6

hmm ... is here a formula for it?

Answer 7

i honestly don't know ... i need help.. ;x

Answer 8

i.e. the sum of the first n fibonacci number is the n + 2 fibonacci minus 1

Answer 9

looks like rigorous work ...

Answer 10

there are all kinds of summation identities for these