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      <text>11.5.0 Introduction</text>
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      <text><![CDATA[<h4>The Chain Rule</h4>

In this Section we will see how to obtain the derivative of a composite function (often referred to as
a `function of a function'). To do this we use the chain rule. This rule can be used to obtain the
derivatives of functions such as \(e^{x^2+3x}\) (the exponential function of a polynomial); \( \sin( \ln x)\) (the sine function of the natural logarithm function); \(\sqrt{x^3 + 4}\) (the square root function of a polynomial).]]></text>
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