math

find the base of the exponential function whose graph contains the given points.
1.( 4, 1/625)
2.(3/2, 27)
3.(3, 1/343)

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asked by Chen
  1. I'll do #1. You can try the others.
    625 = 5^4, so f(x) = 1/5^x or 5^-x

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    posted by Steve
  2. thanks.. :)

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    posted by chen

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