Intersection of functiongraphs

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The underlying JavaScript code

var board = JXG.JSXGraph.initBoard('jxgbox', {
    axis:true,
    boundingbox:[-5, 10, 10, -5]
});

var curve1 = board.create('functiongraph', ['x^2-2'], {strokeColor: 'blue', fixed: false});
var curve2 = board.create('functiongraph', ['4/x', 0.001, 20], {strokeColor: 'black', fixed: false});

var clip = board.create('curveintersection', [curve1, curve2], 
         {strokeWidth: 2, fillColor: 'yellow', fillOpacity: 0.3 });