Use helpLink('interval notation')

Author: paulvojta

OpenProblemLibrary/UVA-Stew5e/setUVA-Stew5e-C02S09-DerivAsFunct/2-9-24.pg

@@ -50,12 +50,8 @@ shortcuts!) to find the derivative of the function
 \[
     f(x) = \frac{$a x + $b}{$c x + $d}.
 \]
-Then state the domain of the function and the domain of the derivative.
-$BR
-$BBOLD Note: $EBOLD When entering interval notation in WeBWorK, use
-$BBOLD I $EBOLD for \(\infty\), $BBOLD -I $EBOLD for \(-\infty\),
-and $BBOLD U $EBOLD for the union symbol.  If the set is empty,
-enter "{}" without the quotation marks.
+Then, using \{ helpLink('interval notation') \}, state the domain of
+the function and the domain of the derivative.
 $BR
 $BR
 \(f'(x)\) = \{ans_rule(25) \}