Difference between revisions of "Rolle's Theorem"

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<html>
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<jsxgraph box="box" width="600" height="400">
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<link rel="stylesheet" type="text/css" href="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraph.css" />
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board = JXG.JSXGraph.initBoard('box', {boundingbox: [-5, 10, 7, -6], axis: true});
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<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/prototype.js"></script>
 
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<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraphcore.js"></script>
 
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<div id="box" class="jxgbox" style="width:600px; height:400px;"></div>
 
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<script language="JavaScript">
 
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        board = JXG.JSXGraph.initBoard('box', {originX: 250, originY: 250, unitX: 50, unitY: 25});
 
 
board.suspendUpdate();
 
board.suspendUpdate();
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        // Axes
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var p = [];
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        xax = board.createElement('axis', [[0,0], [1,0]], {});
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p[0] = board.create('point', [-1,2], {size:3,face:'x',fixed:true});
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        yax = board.createElement('axis', [[0,0], [0,1]], {});
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p[1] = board.create('point', [6,2], {size:3,face:'x',fixed:true});
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p[2] = board.create('point', [-0.5,1], {size:2});
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        var p = [];
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p[3] = board.create('point', [2,0.5], {size:2});
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        p[0] = board.createElement('point', [-1,2], {style:1,fixed:true});
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var f = JXG.Math.Numerics.lagrangePolynomial(p);
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        p[1] = board.createElement('point', [6,2], {style:1,fixed:true});
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var graph = board.create('functiongraph', [f, -10, 10]);
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        p[2] = board.createElement('point', [-0.5,1], {style:4});
 
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        p[3] = board.createElement('point', [2,0.5], {style:4});
 
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        var f = board.lagrangePolynomial(p);
 
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    var graph = board.createElement('functiongraph', [f, -10, 10]);
 
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    var r = board.createElement('glider', [function() { return board.root(board.D(f),(p[0].X()+p[1].X())*0.5); },
 
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                    function() { return f(board.root(board.D(f),(p[0].X()+p[1].X())*0.5)); },graph],
 
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        {name:' ',style:6});
 
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  var r2 = board.createElement('tangent', [r]); //function(){ return r.X()+0.01;},
 
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//      function(){ return f(r.X()+0.01);}], {style:7,visible:false});
 
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−
 
 
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//line = board.createElement('line',[r,r2],{strokeColor:'#ff0000'});
 
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line = board.createElement('line',[p[0],p[1]],{strokeColor:'#ff0000',dash:1});
 
  
 +
var r = board.create('glider', [function() { return JXG.Math.Numerics.root(JXG.Math.Numerics.D(f),(p[0].X()+p[1].X())*0.5); },
 +
                                function() { return f(JXG.Math.Numerics.root(JXG.Math.Numerics.D(f),(p[0].X()+p[1].X())*0.5)); },graph],
 +
                                {name:' ',size:4});
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var t = board.create('tangent', [r], {strokeColor:'#ff0000'});
 +
line = board.create('line',[p[0],p[1]],{strokeColor:'#ff0000',dash:1});
 
board.unsuspendUpdate();
 
board.unsuspendUpdate();
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</script>
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</jsxgraph>
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</html>
 
  
 
=== The underlying JavaScript code ===
 
=== The underlying JavaScript code ===
 
<source lang="javascript">
 
<source lang="javascript">
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        board = JXG.JSXGraph.initBoard('box', {originX: 250, originY: 250, unitX: 50, unitY: 25});
+
board = JXG.JSXGraph.initBoard('box', {boundingbox: [-5, 10, 7, -6], axis: true});
 
board.suspendUpdate();
 
board.suspendUpdate();
−
        // Axes
+
var p = [];
−
        xax = board.createElement('axis', [[0,0], [1,0]], {});
+
p[0] = board.create('point', [-1,2], {size:3,face:'x',fixed:true});
−
        yax = board.createElement('axis', [[0,0], [0,1]], {});
+
p[1] = board.create('point', [6,2], {size:3,face:'x',fixed:true});
 +
p[2] = board.create('point', [-0.5,1], {size:2});
 +
p[3] = board.create('point', [2,0.5], {size:2});
 +
var f = JXG.Math.Numerics.lagrangePolynomial(p);
 +
var graph = board.create('functiongraph', [f, -10, 10]);
  
−
        var p = [];
+
var r = board.create('glider', [function() { return JXG.Math.Numerics.root(JXG.Math.Numerics.D(f),(p[0].X()+p[1].X())*0.5); },
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        p[0] = board.createElement('point', [-1,2], {style:1,fixed:true});
+
                                function() { return f(JXG.Math.Numerics.root(JXG.Math.Numerics.D(f),(p[0].X()+p[1].X())*0.5)); },graph],  
−
        p[1] = board.createElement('point', [6,2], {style:1,fixed:true});
+
                                {name:' ',size:4});
−
        p[2] = board.createElement('point', [-0.5,1], {style:4});
+
var t = board.create('tangent', [r], {strokeColor:'#ff0000'});
−
        p[3] = board.createElement('point', [2,0.5], {style:4});
+
line = board.create('line',[p[0],p[1]],{strokeColor:'#ff0000',dash:1});
−
        var f = board.lagrangePolynomial(p);
+
board.unsuspendUpdate();
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    var graph = board.createElement('functiongraph', [f, -10, 10]);
+
</source>
  
−
    var r = board.createElement('point', [function() { return board.root(board.D(f),(p[0].X()+p[1].X())*0.5); },
 
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                    function() { return f(board.root(board.D(f),(p[0].X()+p[1].X())*0.5)); }],
 
−
        {name:' ',style:6});
 
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  var r2 = board.createElement('point', [function(){ return r.X()+0.01;},
 
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      function(){ return f(r.X()+0.01);}], {style:7,visible:false});
 
  
−
 
−
line = board.createElement('line',[r,r2],{strokeColor:'#ff0000'});
 
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line = board.createElement('line',[p[0],p[1]],{strokeColor:'#ff0000',dash:1});
 
−
 
−
board.unsuspendUpdate();
 
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</source>
 
 
[[Category:Examples]]
 
[[Category:Examples]]
 
[[Category:Calculus]]
 
[[Category:Calculus]]

Latest revision as of 17:52, 20 February 2013

The underlying JavaScript code

board = JXG.JSXGraph.initBoard('box', {boundingbox: [-5, 10, 7, -6], axis: true});
board.suspendUpdate();
var p = [];
p[0] = board.create('point', [-1,2], {size:3,face:'x',fixed:true});
p[1] = board.create('point', [6,2], {size:3,face:'x',fixed:true});
p[2] = board.create('point', [-0.5,1], {size:2});
p[3] = board.create('point', [2,0.5], {size:2});
var f = JXG.Math.Numerics.lagrangePolynomial(p);
var graph = board.create('functiongraph', [f, -10, 10]);

var r = board.create('glider', [function() { return JXG.Math.Numerics.root(JXG.Math.Numerics.D(f),(p[0].X()+p[1].X())*0.5); },
                                function() { return f(JXG.Math.Numerics.root(JXG.Math.Numerics.D(f),(p[0].X()+p[1].X())*0.5)); },graph], 
                                {name:' ',size:4});
var t = board.create('tangent', [r], {strokeColor:'#ff0000'});
line = board.create('line',[p[0],p[1]],{strokeColor:'#ff0000',dash:1});
board.unsuspendUpdate();
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