Math (fibonacci
posted by Lexmo .
A sequence of numbers is called a Fibonaccitype sequence if each number (after for the first two) is the sum of the two numbers which precede it. For example, 1, 1, 2, 3, 5, 8 ... is a Fibonacci type sequence. If 1985, x, y, 200 are four consecutive terms in a Fibonaccitype sequence, then x equals...
I don't know what they want. Please help.

Math (fibonacci 
Damon
y = 1985 + x
200 = x + y
so
200 = x + (1985+x)
back to you :) 
Math (fibonacci 
Damon
By the way I suspect you mean 2000 not 200

Math (fibonacci 
Steve
y = 1985+x
200 = x+y
Eliminate y and we have
1985+x = 200x
2x = 1785
x = 892.5
and the numbers are
1985, 892.5, 1092.5, 200 
Math (fibonacci 
Damon
It would help if that last date were odd :)

Math (fibonacci 
Lexmo
It is 2000. But thanks!
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