Voorbeeld 1
$
\eqalign{
& f(x) = {{2x} \over {2x^2 + 3}} \cr
& f'(x) = {{2\left( {2x^2 + 3} \right) - 2x \cdot 4x} \over {\left( {2x^2 + 3} \right)^2 }} \cr
& f'(x) = {{4x^2 + 6 - 8x^2 } \over {\left( {2x^2 + 3} \right)^2 }} \cr
& f'(x) = {{ - 4x^2 + 6} \over {\left( {2x^2 + 3} \right)^2 }} \cr}
$
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