Posted by Sara on .
what is the domain of each of the following functions,their intercepts and thier range?
f(x)=x+3 and f(x)=2x3 if x<2 and x>=2

College Algebra 
Steve,
All polynomials have a domain of all reals numbers.
Just plug in x=0 to get the yintercept, and f(x)=0 to get the xintercept.
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,
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