Average Error: 46.8 → 16.4
Time: 4.4m
Precision: 64
Internal Precision: 3136
\[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}}\]
\[\begin{array}{l} \mathbf{if}\;\left(\left(i \cdot \left(\frac{1}{36} \cdot i\right) + \left(\frac{1}{6} \cdot i + 1\right)\right) \cdot \sqrt[3]{\left(1 + \frac{1}{2} \cdot i\right) + \frac{1}{6} \cdot \left(i \cdot i\right)}\right) \cdot \left(\left(100 \cdot n\right) \cdot \sqrt[3]{\left(1 + \frac{1}{2} \cdot i\right) + \frac{1}{6} \cdot \left(i \cdot i\right)}\right) \le -4.943788105127082 \cdot 10^{+295}:\\ \;\;\;\;\frac{100 \cdot \left({\left(1 + \frac{i}{n}\right)}^{n} - 1\right)}{\frac{i}{n}}\\ \mathbf{if}\;\left(\left(i \cdot \left(\frac{1}{36} \cdot i\right) + \left(\frac{1}{6} \cdot i + 1\right)\right) \cdot \sqrt[3]{\left(1 + \frac{1}{2} \cdot i\right) + \frac{1}{6} \cdot \left(i \cdot i\right)}\right) \cdot \left(\left(100 \cdot n\right) \cdot \sqrt[3]{\left(1 + \frac{1}{2} \cdot i\right) + \frac{1}{6} \cdot \left(i \cdot i\right)}\right) \le -3.185864819664644 \cdot 10^{-208}:\\ \;\;\;\;\left(\left(i \cdot \left(\frac{1}{36} \cdot i\right) + \left(\frac{1}{6} \cdot i + 1\right)\right) \cdot \sqrt[3]{\left(1 + \frac{1}{2} \cdot i\right) + \frac{1}{6} \cdot \left(i \cdot i\right)}\right) \cdot \left(\left(100 \cdot n\right) \cdot \sqrt[3]{\left(1 + \frac{1}{2} \cdot i\right) + \frac{1}{6} \cdot \left(i \cdot i\right)}\right)\\ \mathbf{if}\;\left(\left(i \cdot \left(\frac{1}{36} \cdot i\right) + \left(\frac{1}{6} \cdot i + 1\right)\right) \cdot \sqrt[3]{\left(1 + \frac{1}{2} \cdot i\right) + \frac{1}{6} \cdot \left(i \cdot i\right)}\right) \cdot \left(\left(100 \cdot n\right) \cdot \sqrt[3]{\left(1 + \frac{1}{2} \cdot i\right) + \frac{1}{6} \cdot \left(i \cdot i\right)}\right) \le 5.601788448279894 \cdot 10^{-249}:\\ \;\;\;\;\left(\frac{100}{i} \cdot n\right) \cdot \left({\left(\frac{i}{n}\right)}^{n} - 1\right)\\ \mathbf{if}\;\left(\left(i \cdot \left(\frac{1}{36} \cdot i\right) + \left(\frac{1}{6} \cdot i + 1\right)\right) \cdot \sqrt[3]{\left(1 + \frac{1}{2} \cdot i\right) + \frac{1}{6} \cdot \left(i \cdot i\right)}\right) \cdot \left(\left(100 \cdot n\right) \cdot \sqrt[3]{\left(1 + \frac{1}{2} \cdot i\right) + \frac{1}{6} \cdot \left(i \cdot i\right)}\right) \le 1.5893655743611886 \cdot 10^{+306}:\\ \;\;\;\;\left(\left(i \cdot \left(\frac{1}{36} \cdot i\right) + \left(\frac{1}{6} \cdot i + 1\right)\right) \cdot \sqrt[3]{\left(1 + \frac{1}{2} \cdot i\right) + \frac{1}{6} \cdot \left(i \cdot i\right)}\right) \cdot \left(\left(100 \cdot n\right) \cdot \sqrt[3]{\left(1 + \frac{1}{2} \cdot i\right) + \frac{1}{6} \cdot \left(i \cdot i\right)}\right)\\ \mathbf{else}:\\ \;\;\;\;\left(\frac{100}{i} \cdot n\right) \cdot \left({\left(\frac{i}{n}\right)}^{n} - 1\right)\\ \end{array}\]

Error

Bits error versus i

Bits error versus n

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original46.8
Target46.8
Herbie16.4
\[100 \cdot \frac{e^{n \cdot \begin{array}{l} \mathbf{if}\;1 + \frac{i}{n} = 1:\\ \;\;\;\;\frac{i}{n}\\ \mathbf{else}:\\ \;\;\;\;\frac{\frac{i}{n} \cdot \log \left(1 + \frac{i}{n}\right)}{\left(\frac{i}{n} + 1\right) - 1}\\ \end{array}} - 1}{\frac{i}{n}}\]

Derivation

  1. Split input into 5 regimes
  2. if (* (* (+ (* i (* 1/36 i)) (+ (* 1/6 i) 1)) (cbrt (+ (+ 1 (* 1/2 i)) (* 1/6 (* i i))))) (* (* 100 n) (cbrt (+ (+ 1 (* 1/2 i)) (* 1/6 (* i i)))))) < -4.943788105127082e+295

    1. Initial program 15.9

      \[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}}\]
    2. Using strategy rm
    3. Applied associate-*r/15.9

      \[\leadsto \color{blue}{\frac{100 \cdot \left({\left(1 + \frac{i}{n}\right)}^{n} - 1\right)}{\frac{i}{n}}}\]

    if -4.943788105127082e+295 < (* (* (+ (* i (* 1/36 i)) (+ (* 1/6 i) 1)) (cbrt (+ (+ 1 (* 1/2 i)) (* 1/6 (* i i))))) (* (* 100 n) (cbrt (+ (+ 1 (* 1/2 i)) (* 1/6 (* i i)))))) < -3.185864819664644e-208

    1. Initial program 56.7

      \[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}}\]
    2. Taylor expanded around 0 28.4

      \[\leadsto 100 \cdot \frac{\color{blue}{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}}{\frac{i}{n}}\]
    3. Using strategy rm
    4. Applied div-inv28.4

      \[\leadsto 100 \cdot \frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{\color{blue}{i \cdot \frac{1}{n}}}\]
    5. Applied associate-/r*13.9

      \[\leadsto 100 \cdot \color{blue}{\frac{\frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{i}}{\frac{1}{n}}}\]
    6. Using strategy rm
    7. Applied *-un-lft-identity13.9

      \[\leadsto 100 \cdot \frac{\frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{i}}{\color{blue}{1 \cdot \frac{1}{n}}}\]
    8. Applied add-cube-cbrt13.9

      \[\leadsto 100 \cdot \frac{\color{blue}{\left(\sqrt[3]{\frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{i}} \cdot \sqrt[3]{\frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{i}}\right) \cdot \sqrt[3]{\frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{i}}}}{1 \cdot \frac{1}{n}}\]
    9. Applied times-frac13.9

      \[\leadsto 100 \cdot \color{blue}{\left(\frac{\sqrt[3]{\frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{i}} \cdot \sqrt[3]{\frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{i}}}{1} \cdot \frac{\sqrt[3]{\frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{i}}}{\frac{1}{n}}\right)}\]
    10. Applied simplify13.9

      \[\leadsto 100 \cdot \left(\color{blue}{\left(\sqrt[3]{\frac{i}{i} \cdot \left(\left(i \cdot i\right) \cdot \frac{1}{6} + \left(\frac{1}{2} \cdot i + 1\right)\right)} \cdot \sqrt[3]{\frac{i}{i} \cdot \left(\left(i \cdot i\right) \cdot \frac{1}{6} + \left(\frac{1}{2} \cdot i + 1\right)\right)}\right)} \cdot \frac{\sqrt[3]{\frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{i}}}{\frac{1}{n}}\right)\]
    11. Applied simplify13.8

      \[\leadsto 100 \cdot \left(\left(\sqrt[3]{\frac{i}{i} \cdot \left(\left(i \cdot i\right) \cdot \frac{1}{6} + \left(\frac{1}{2} \cdot i + 1\right)\right)} \cdot \sqrt[3]{\frac{i}{i} \cdot \left(\left(i \cdot i\right) \cdot \frac{1}{6} + \left(\frac{1}{2} \cdot i + 1\right)\right)}\right) \cdot \color{blue}{\left(n \cdot \sqrt[3]{\frac{i}{i} \cdot \left(\left(1 + \frac{1}{2} \cdot i\right) + \left(i \cdot i\right) \cdot \frac{1}{6}\right)}\right)}\right)\]
    12. Taylor expanded around 0 13.9

      \[\leadsto 100 \cdot \left(\left(\sqrt[3]{\frac{i}{i} \cdot \left(\left(i \cdot i\right) \cdot \frac{1}{6} + \left(\frac{1}{2} \cdot i + 1\right)\right)} \cdot \color{blue}{\left(\frac{1}{6} \cdot i + \left(\frac{1}{36} \cdot {i}^{2} + 1\right)\right)}\right) \cdot \left(n \cdot \sqrt[3]{\frac{i}{i} \cdot \left(\left(1 + \frac{1}{2} \cdot i\right) + \left(i \cdot i\right) \cdot \frac{1}{6}\right)}\right)\right)\]
    13. Applied simplify13.9

      \[\leadsto \color{blue}{\left(\left(i \cdot \left(\frac{1}{36} \cdot i\right) + \left(\frac{1}{6} \cdot i + 1\right)\right) \cdot \sqrt[3]{\left(1 + \frac{1}{2} \cdot i\right) + \frac{1}{6} \cdot \left(i \cdot i\right)}\right) \cdot \left(\left(100 \cdot n\right) \cdot \sqrt[3]{\left(1 + \frac{1}{2} \cdot i\right) + \frac{1}{6} \cdot \left(i \cdot i\right)}\right)}\]

    if -3.185864819664644e-208 < (* (* (+ (* i (* 1/36 i)) (+ (* 1/6 i) 1)) (cbrt (+ (+ 1 (* 1/2 i)) (* 1/6 (* i i))))) (* (* 100 n) (cbrt (+ (+ 1 (* 1/2 i)) (* 1/6 (* i i)))))) < 5.601788448279894e-249

    1. Initial program 20.8

      \[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}}\]
    2. Taylor expanded around inf 48.5

      \[\leadsto 100 \cdot \color{blue}{\frac{\left(e^{\left(\log \left(\frac{1}{n}\right) - \log \left(\frac{1}{i}\right)\right) \cdot n} - 1\right) \cdot n}{i}}\]
    3. Applied simplify21.4

      \[\leadsto \color{blue}{\left(\frac{100}{i} \cdot n\right) \cdot \left({\left(\frac{i}{n}\right)}^{n} - 1\right)}\]

    if 5.601788448279894e-249 < (* (* (+ (* i (* 1/36 i)) (+ (* 1/6 i) 1)) (cbrt (+ (+ 1 (* 1/2 i)) (* 1/6 (* i i))))) (* (* 100 n) (cbrt (+ (+ 1 (* 1/2 i)) (* 1/6 (* i i)))))) < 1.5893655743611886e+306

    1. Initial program 56.7

      \[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}}\]
    2. Taylor expanded around 0 28.3

      \[\leadsto 100 \cdot \frac{\color{blue}{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}}{\frac{i}{n}}\]
    3. Using strategy rm
    4. Applied div-inv28.4

      \[\leadsto 100 \cdot \frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{\color{blue}{i \cdot \frac{1}{n}}}\]
    5. Applied associate-/r*14.1

      \[\leadsto 100 \cdot \color{blue}{\frac{\frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{i}}{\frac{1}{n}}}\]
    6. Using strategy rm
    7. Applied *-un-lft-identity14.1

      \[\leadsto 100 \cdot \frac{\frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{i}}{\color{blue}{1 \cdot \frac{1}{n}}}\]
    8. Applied add-cube-cbrt14.1

      \[\leadsto 100 \cdot \frac{\color{blue}{\left(\sqrt[3]{\frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{i}} \cdot \sqrt[3]{\frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{i}}\right) \cdot \sqrt[3]{\frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{i}}}}{1 \cdot \frac{1}{n}}\]
    9. Applied times-frac14.1

      \[\leadsto 100 \cdot \color{blue}{\left(\frac{\sqrt[3]{\frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{i}} \cdot \sqrt[3]{\frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{i}}}{1} \cdot \frac{\sqrt[3]{\frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{i}}}{\frac{1}{n}}\right)}\]
    10. Applied simplify14.1

      \[\leadsto 100 \cdot \left(\color{blue}{\left(\sqrt[3]{\frac{i}{i} \cdot \left(\left(i \cdot i\right) \cdot \frac{1}{6} + \left(\frac{1}{2} \cdot i + 1\right)\right)} \cdot \sqrt[3]{\frac{i}{i} \cdot \left(\left(i \cdot i\right) \cdot \frac{1}{6} + \left(\frac{1}{2} \cdot i + 1\right)\right)}\right)} \cdot \frac{\sqrt[3]{\frac{\frac{1}{6} \cdot {i}^{3} + \left(\frac{1}{2} \cdot {i}^{2} + i\right)}{i}}}{\frac{1}{n}}\right)\]
    11. Applied simplify14.0

      \[\leadsto 100 \cdot \left(\left(\sqrt[3]{\frac{i}{i} \cdot \left(\left(i \cdot i\right) \cdot \frac{1}{6} + \left(\frac{1}{2} \cdot i + 1\right)\right)} \cdot \sqrt[3]{\frac{i}{i} \cdot \left(\left(i \cdot i\right) \cdot \frac{1}{6} + \left(\frac{1}{2} \cdot i + 1\right)\right)}\right) \cdot \color{blue}{\left(n \cdot \sqrt[3]{\frac{i}{i} \cdot \left(\left(1 + \frac{1}{2} \cdot i\right) + \left(i \cdot i\right) \cdot \frac{1}{6}\right)}\right)}\right)\]
    12. Taylor expanded around 0 14.0

      \[\leadsto 100 \cdot \left(\left(\sqrt[3]{\frac{i}{i} \cdot \left(\left(i \cdot i\right) \cdot \frac{1}{6} + \left(\frac{1}{2} \cdot i + 1\right)\right)} \cdot \color{blue}{\left(\frac{1}{6} \cdot i + \left(\frac{1}{36} \cdot {i}^{2} + 1\right)\right)}\right) \cdot \left(n \cdot \sqrt[3]{\frac{i}{i} \cdot \left(\left(1 + \frac{1}{2} \cdot i\right) + \left(i \cdot i\right) \cdot \frac{1}{6}\right)}\right)\right)\]
    13. Applied simplify14.0

      \[\leadsto \color{blue}{\left(\left(i \cdot \left(\frac{1}{36} \cdot i\right) + \left(\frac{1}{6} \cdot i + 1\right)\right) \cdot \sqrt[3]{\left(1 + \frac{1}{2} \cdot i\right) + \frac{1}{6} \cdot \left(i \cdot i\right)}\right) \cdot \left(\left(100 \cdot n\right) \cdot \sqrt[3]{\left(1 + \frac{1}{2} \cdot i\right) + \frac{1}{6} \cdot \left(i \cdot i\right)}\right)}\]

    if 1.5893655743611886e+306 < (* (* (+ (* i (* 1/36 i)) (+ (* 1/6 i) 1)) (cbrt (+ (+ 1 (* 1/2 i)) (* 1/6 (* i i))))) (* (* 100 n) (cbrt (+ (+ 1 (* 1/2 i)) (* 1/6 (* i i))))))

    1. Initial program 53.4

      \[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}}\]
    2. Taylor expanded around inf 29.2

      \[\leadsto 100 \cdot \color{blue}{\frac{\left(e^{\left(\log \left(\frac{1}{n}\right) - \log \left(\frac{1}{i}\right)\right) \cdot n} - 1\right) \cdot n}{i}}\]
    3. Applied simplify32.2

      \[\leadsto \color{blue}{\left(\frac{100}{i} \cdot n\right) \cdot \left({\left(\frac{i}{n}\right)}^{n} - 1\right)}\]
  3. Recombined 5 regimes into one program.

Runtime

Time bar (total: 4.4m)Debug logProfile

herbie shell --seed 2020178 
(FPCore (i n)
  :name "Compound Interest"

  :herbie-target
  (* 100 (/ (- (exp (* n (if (== (+ 1 (/ i n)) 1) (/ i n) (/ (* (/ i n) (log (+ 1 (/ i n)))) (- (+ (/ i n) 1) 1))))) 1) (/ i n)))

  (* 100 (/ (- (pow (+ 1 (/ i n)) n) 1) (/ i n))))