u - 経済統計練習帳

package neko;
 
import org.apache.commons.math3.analysis.UnivariateFunction;
import org.apache.commons.math3.analysis.solvers.BracketingNthOrderBrentSolver;
import org.apache.commons.math3.analysis.solvers.UnivariateSolver;
 
class pro{
 
public static void main(String[] args) {
 
pro test=new pro();
}
 
pro(){
 
UnivariateSolver sol = new BracketingNthOrderBrentSolver();      
double re = sol.solve(120, f, 0, 2);
 
System.out.println(re);
 
}
 
UnivariateFunction f = new UnivariateFunction() {
public double value(double x) {
return  3*x*x+2*x;
}            
};
}