Average Error: 0.0 → 0.0
Time: 33.1s
Precision: 64
\[\frac{x + 1}{1 - x}\]
↓
\[\frac{x + 1}{1 - x}\]
\frac{x + 1}{1 - x}
↓
\frac{x + 1}{1 - x}
double f(double x) {
        double r45949 = x;
        double r45950 = 1.0;
        double r45951 = r45949 + r45950;
        double r45952 = r45950 - r45949;
        double r45953 = r45951 / r45952;
        return r45953;
}
↓
double f(double x) {
        double r45954 = x;
        double r45955 = 1.0;
        double r45956 = r45954 + r45955;
        double r45957 = r45955 - r45954;
        double r45958 = r45956 / r45957;
        return r45958;
}

Error

Bits error versus x

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Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.0

    \[\frac{x + 1}{1 - x}\]

  2. Final simplification0.0

    \[\leadsto \frac{x + 1}{1 - x}\]

Reproduce

herbie shell --seed 2019200 
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  (/ (+ x 1) (- 1 x)))