In a certain sequence, the next term is found by taking the number before it minus the number two numbers before it.

For example, in the sequence a, b, c, d... c = b-a, d = c-b, and so on.

Starting with 54 and 93, what would be the sum of the first six thousand terms?

if we continue the sequence we finde that  it is

54.93.39.-54.-93.-39.and it strs over

so for every six numbers the sum is zero and six thousand numbers means one thousand seros whick sums to zero

Posted by hunter on 2004-03-30 08:39:09