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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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package org.apache.commons.math.analysis;
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import org.apache.commons.math.FunctionEvaluationException;
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* Auxillary class for testing solvers.
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* @version $Revision: 799857 $ $Date: 2009-08-01 09:07:12 -0400 (Sat, 01 Aug 2009) $
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public class QuinticFunction implements DifferentiableUnivariateRealFunction {
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* @see org.apache.commons.math.UnivariateRealFunction#value(double)
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public double value(double x) throws FunctionEvaluationException {
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return (x-1)*(x-0.5)*x*(x+0.5)*(x+1);
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public UnivariateRealFunction derivative() {
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return new UnivariateRealFunction() {
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public double value(double x) throws FunctionEvaluationException {
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return (5*x*x-3.75)*x*x+0.25;