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<!DOCTYPE html>
<html data-require="math polynomials expressions">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Functions 3</title>
<script src="../khan-exercise.js"></script>
</head>
<body>
<div class="exercise">
<div class="vars" data-ensure="INNER.name !== OUTER.name && INNER.minDegree <= INNER.maxDegree && OUTER.minDegree <= OUTER.maxDegree && abs( INNER_VALUE ) < 200 && abs( OUTER_VALUE ) < 500">
<var id="FUNC_NAMES">shuffle(["f", "g", "h"])</var>
<var id="FUNC_VARIABLES">["x", "n", "t"]</var>
<var id="INNER">new Polynomial( randRange(0, 2), randRangeWeighted(1, 3, 3, 0.2), null, randFromArray(FUNC_VARIABLES), FUNC_NAMES[0] )</var>
<var id="OUTER">new CompositePolynomial( randRange(0, 2), randRangeWeighted(1, 3, 3, 0.2), null, randFromArray(FUNC_VARIABLES), FUNC_NAMES[1], INNER )</var>
</div>
<div class="problems">
<div>
<div class="vars">
<var id="FUNCTIONS">shuffle([INNER, OUTER])</var>
<var id="SOLVE_FOR">shuffle([INNER, OUTER])</var>
<var id="VALUE">randRange(-10, 10)</var>
<var id="INNER_VALUE">SOLVE_FOR[1].evalOf(VALUE)</var>
<!-- Solution -->
<var id="OUTER_VALUE">SOLVE_FOR[0].evalOf(INNER_VALUE)</var>
</div>
<div class="problem">
<ul>
<li><code><var>FUNCTIONS[0].name</var>(<var>FUNCTIONS[0].variable</var>) = <var>FUNCTIONS[0].text()</var></code></li>
<li><code><var>FUNCTIONS[1].name</var>(<var>FUNCTIONS[1].variable</var>) = <var>FUNCTIONS[1].text()</var></code></li>
</ul>
</div>
<p class="question"><code>
<var>SOLVE_FOR[0].name</var>(<var>SOLVE_FOR[1].name</var>(<var>VALUE</var>)) = {?}
</code></p>
<p class="solution"><var>OUTER_VALUE</var></p>
</div>
<div>
<div class="vars" data-ensure="OUTER2.name !== INNER.name && OUTER2.name !== OUTER.name && OUTER2.minDegree <= OUTER2.maxDegree">
<var id="OUTER2">new CompositePolynomial( randRange(0, 2), randRange(1, 3), null, randFromArray(FUNC_VARIABLES), FUNC_NAMES[2], randFromArray([INNER, OUTER]) )</var>
<var id="FUNCTIONS">shuffle([INNER, OUTER, OUTER2])</var>
<var id="SOLVE_FOR">shuffle([INNER, OUTER, OUTER2])</var>
<var id="VALUE">randRange(-10, 10)</var>
<var id="INNER_VALUE">SOLVE_FOR[1].evalOf(VALUE)</var>
<!-- Solution -->
<var id="OUTER_VALUE">SOLVE_FOR[0].evalOf(INNER_VALUE)</var>
</div>
<div class="problem">
<ul>
<li><code><var>FUNCTIONS[0].name</var>(<var>FUNCTIONS[0].variable</var>) = <var>FUNCTIONS[0].text()</var></code></li>
<li><code><var>FUNCTIONS[1].name</var>(<var>FUNCTIONS[1].variable</var>) = <var>FUNCTIONS[1].text()</var></code></li>
<li><code><var>FUNCTIONS[2].name</var>(<var>FUNCTIONS[2].variable</var>) = <var>FUNCTIONS[2].text()</var></code></li>
</ul>
</div>
<p class="question"><code>
<var>SOLVE_FOR[0].name</var>(<var>SOLVE_FOR[1].name</var>(<var>VALUE</var>)) = {?}
</code></p>
<p class="solution"><var>OUTER_VALUE</var></p>
</div>
</div>
<div class="hints">
<p>First, let's solve for the value of the inner function, <code><var>SOLVE_FOR[1].name</var>(<var>VALUE</var>)</code>. Then we'll know what to plug into the outer function.</p>
<div data-each="SOLVE_FOR[1].hint(VALUE) as key, value"><var>value</var></div>
<p>Now we know that <code><var>SOLVE_FOR[1].name</var>(<var>VALUE</var>) = <var>INNER_VALUE</var></code>.
Let's solve for <code><var>SOLVE_FOR[0].name</var>(<var>SOLVE_FOR[1].name</var>(<var>VALUE</var>))</code>, which is <code><var>SOLVE_FOR[0].name</var>(<var>INNER_VALUE</var>)</code>.</p>
<div data-each="SOLVE_FOR[0].hint(INNER_VALUE) as key, value"><var>value</var></div>
</div>
</div>
</body>
</html>
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