Homework Help: College Algebra

Posted by Sara on Tuesday, December 20, 2011 at 3:35pm.

what is the domain of each of the following functions,their intercepts and thier range?
f(x)=x+3 and f(x)=-2x-3 if x<-2 and x>=-2

College Algebra - Steve, Tuesday, December 20, 2011 at 3:42pm
All polynomials have a domain of all reals numbers.

Just plug in x=0 to get the y-intercept, and f(x)=0 to get the x-intercept.

Since these are just lines, the range is also all real numbers.

Not sure what help the "if x<-2 and x>=-2" provides, since that pretty much includes all real numbers.
College Algebra - Anonymous, Sunday, April 21, 2013 at 10:23am
1324413345
College Algebra - chiranjeevi, Sunday, April 21, 2013 at 10:24am
1324413345

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