It is the logarithmic function.
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Exponents are found by using their inverse: logarithms.By definition:a = bxrearranges to: x = logb(a)Most scientific calculators support this function.
A number to a negative exponent is the inverse of the number to the positive exponent. That is, x-a = 1/xa
The inverse function means the opposite calculation. The inverse function of "add 6" would be "subtract 6".
Range
No. A simple example of this is y = x2; the inverse is x = y2, which is not a function.