How do I find the domain and range of logarithmic and exponential equations? August 26, 2009
Posted by Domena in : Mathematics , trackback
Can anyone please help?
How do I find the domain and range of logarithmic and exponential equations?
Advice on intercepts would help too…thanks in advance.Submited by:Derek Hopper
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For the domain of logarithmic functions – the argument of a logarithmic function must be positive
log base 3 of 9 = 2
log base 10 of 0.001 = -3
the argument must be positive => hence
log ( f(x) ) will have a domain limited to f(x) > 0
the rangle for the log function will be R for the full domain
e^x is the inverse of the natural log function. It has a domain of R and a Range of R+