Homework Help: Algebra

Posted by Melanie on Sunday, August 7, 2011 at 10:28am.

I think this is a easy trick question, so I probably know the answer but I just wanted to double check.
What is the domain and range of the function f(x) = 3^x

Find the f^-1 and its domain and range?

Thanks for your help.

Algebra - Reiny, Sunday, August 7, 2011 at 10:36am
domain: any real number
range: any real number > 0

for the domain of the inverse function, since you interchange the x and the y,
the range of the old becomes the domain of the inverse, and vice versa.
Algebra - Melanie, Sunday, August 7, 2011 at 11:06am
Thank you - that is exactly what I thought!

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