(pow b (- (- n 1)))

Average Error: 0.2 → 0.2

Time: 2.6s

Precision: binary64

Math

\[{b}^{\left(-\left(n - 1\right)\right)}\]

↓

\[{b}^{\left(-\left(n - 1\right)\right)}\]

Error

Bits error versus b

Bits error versus n

Derivation

1. Initial program 0.2

   \[{b}^{\left(-\left(n - 1\right)\right)}\]

2. Final simplification 0.2

   \[\leadsto {b}^{\left(-\left(n - 1\right)\right)}\]

Reproduce

herbie shell --seed 2020153 
(FPCore (b n)
  :name "(pow b (- (- n 1)))"
  :precision binary64
  (pow b (neg (- n 1.0))))