Below is the graph of f(x) = (a^x)/b, where a and b are integers. Find a+b.
(Each little square measures 1 unit by 1 unit.)
When x = 2 f(2) = -2 so a^2/b = -2 (1)
When x = 3 f(3) = -8 so a^3/b = -8 (2)
From (1) b = -a^2/2 (3)
Use (3) in (2): -2a = -8 so a = 4
Use this in (3): b = -4^2/2 so b = -8
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+249 
