Finite Math Examples

Find the Domain of the Difference of the Two Functions
f(x)=x2+2x+1f(x)=x2+2x+1 , g(x)=xg(x)=x
Step 1
Find the difference of the functions.
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Step 1.1
Replace the function designators with the actual functions in f(x)-gxf(x)gx.
x2+2x+1-(x)x2+2x+1(x)
Step 1.2
Subtract xx from 2x2x.
x2+x+1x2+x+1
x2+x+1x2+x+1
Step 2
The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.
Interval Notation:
(-,)(,)
Set-Builder Notation:
{x|x}
Step 3
Enter YOUR Problem
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 [x2  12  π  xdx ] 
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