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f(n)=1X2n-1
how do i get a decimal in an explicit formula problem?
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1 Answer
Because any number multiplied by 1 is itself...1 X n = n, you could restate this function as f(n)=2(n-1).
Therefore
f(0)=2-1=1/2=.5.
f(1)=20=1
f(2)=21=2
etc.
Comments
for me, the question is not stated clearly enough --- what are the values of "n" --- could you possibly re-phrase the question?
if the values of n are 0, -1, -2, -3, etc., then we would have the following:
I wonder if the following would help: f(0) = 2^(0-1) = 2^(-1) = 1/2 = 0.5
f(-1) = 2^(-1-1) = 2^(-2) = 1/(2^2) = 1/4 = 0.25
f(-2) = 2^(-2-1) = 2^(-3) = 1/(2^3) = 1/8 = 0.125
etc., etc., etc.
- Herb K. 1/17/2013