32 lines
802 B
JavaScript
32 lines
802 B
JavaScript
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const b = JXG.JSXGraph.initBoard('jsxgraph', {
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boundingbox: [-0.5,0.3,1.5,-1/4], axis:true
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});
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var g = function(x) { return x*x*x*x + 10*x*x - 60* x + 100}
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var f = function(x) {return 1/Math.sqrt(g(x))};
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var type = "right";
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var l = 0;
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var r = 1;
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var rsum = function() {
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return JXG.Math.Numerics.riemannsum(f,n.Value(), type, l, r);
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};
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var n = b.create('slider', [[0.1, -0.05],[0.75,-0.05], [2,1,50]],{name:'n',snapWidth:1});
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var graph = b.create('functiongraph', [f, l, r]);
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var os = b.create('riemannsum',
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[f,
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function(){ return n.Value();},
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type, l, r
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],
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{fillColor:'#ffff00', fillOpacity:0.3});
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b.create('text', [0.1,0.25, function(){
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return 'Riemann sum='+(rsum().toFixed(4));
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}]);
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