Vertex equations of a quadratic function and it's inverse: Difference between revisions

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})();
})();
</jsxgraph>
</jsxgraph>
=== JavaScript code ===
<source lang="javascript">
var b = JXG.JSXGraph.initBoard('box1', {boundingbox: [-5, 5, 5, -5], grid:true});
var v = b.create('point', [0,0], {name:'V'}),
    p = b.create('point', [3,3], {name:'P'}),
    f = b.create('functiongraph', [
            function(x) {
                var den = p.X()- v.X(),
                    a = (p.Y() - v.Y()) / (den * den);
                return a * (x - v.X()) * (x - v.X()) + v.Y();
            }]);
})();
</source>


<jsxgraph width="300" height="300" box="box2">
<jsxgraph width="300" height="300" box="box2">
Line 28: Line 42:
})();
})();
</jsxgraph>
</jsxgraph>
=== JavaScript code ===
<source lang="javascript">
var b = JXG.JSXGraph.initBoard('box2', {boundingbox: [-5, 5, 5, -5], grid:true});
var v = b.create('point', [0,0], {name:'V'}),
    p = b.create('point', [3,3], {name:'P'}),
    f = b.create('functiongraph', [
            function(x) {
                var den = p.Y()- v.Y(),
                    a = (p.X() - v.X()) / (den * den);
                return Math.sqrt((x - v.X()) / a) + v.Y();
            }]);


</source>





Revision as of 10:19, 16 December 2014

JavaScript code

var b = JXG.JSXGraph.initBoard('box1', {boundingbox: [-5, 5, 5, -5], grid:true});
var v = b.create('point', [0,0], {name:'V'}),
    p = b.create('point', [3,3], {name:'P'}),
    f = b.create('functiongraph', [
             function(x) {
                 var den = p.X()- v.X(),
                     a = (p.Y() - v.Y()) / (den * den);
                 return a * (x - v.X()) * (x - v.X()) + v.Y();
             }]);

})();

JavaScript code

var b = JXG.JSXGraph.initBoard('box2', {boundingbox: [-5, 5, 5, -5], grid:true});
var v = b.create('point', [0,0], {name:'V'}),
    p = b.create('point', [3,3], {name:'P'}),
    f = b.create('functiongraph', [
             function(x) {
                 var den = p.Y()- v.Y(),
                     a = (p.X() - v.X()) / (den * den);
                 return Math.sqrt((x - v.X()) / a) + v.Y();
             }]);