Question 684003
A) Rational functions:  Denominators must NEVER be ZERO.


B) Radical functions:  Radicands must be GREATER than or EQUAL to ZERO.


C) Logarithmic functions:  For {{{y = log (b, x) base numbers must never be negative, zero, or 1.  In other words, b>0 and b not equal to 1.  Secondly, x>0.  In other words, you can't have the log of a negative number. 

D) Exponential functions:  There are NO restrictions on x.  Domain is all real numbers. 


Dr. Robert J. Rapalje, Retired
Seminole State College of Florida


www.mathinlivingcolor.com.