Vertex equations of a quadratic function and it's inverse: Difference between revisions
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A WASSERMANN (talk | contribs) No edit summary |
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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"> | ||
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})(); | })(); | ||
</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();
}]);