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13 virtual double getValue(
const double x)
const;
14 virtual void setScale(
const double x);
18 virtual double getDf(
const double x)
const;
35 double rtnewt(
const double x1,
const double x2,
const double xacc)
const;
45 double rtsecan(
double xn_1,
double xn,
const double xacc)
const;