F is a function that describes a sequence and is therefore defined over the positive integers. Find the first four terms of the sequence.
f(n) = 100(-0.1)n-1

f(0) = -1000, f(1) = 100, f (2) = -10, f(3) = 1
f(1) = -10, f (2) = 1, f (3) = -0.1, f (4) = 0.01
f(1) = 100, f (2) = 10 f(3) = 1, f (4) = 0.1
f(1) = 100, f (2) = -10, f(3) = 1, f (4) = -0.1

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