Average Error: 47.1 → 14.3
Time: 1.0m
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(\sqrt[3]{i + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(i \cdot i\right)} \cdot \left(n \cdot 100\right)\right) \cdot \frac{\left(\sqrt[3]{i} + \left(\sqrt[3]{{i}^{4}} \cdot \frac{1}{6} + \sqrt[3]{{i}^{7}} \cdot \frac{1}{36}\right)\right) \cdot \sqrt[3]{i + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(i \cdot i\right)}}{i} \le -1.770573189712183 \cdot 10^{+308}:\\ \;\;\;\;\left(\left(n \cdot 100\right) \cdot \sqrt[3]{{\left(1 + \frac{i}{n}\right)}^{n} - 1}\right) \cdot \frac{\sqrt[3]{{\left(1 + \frac{i}{n}\right)}^{n} - 1} \cdot \sqrt[3]{{\left(1 + \frac{i}{n}\right)}^{n} - 1}}{i}\\ \mathbf{elif}\;\left(\sqrt[3]{i + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(i \cdot i\right)} \cdot \left(n \cdot 100\right)\right) \cdot \frac{\left(\sqrt[3]{i} + \left(\sqrt[3]{{i}^{4}} \cdot \frac{1}{6} + \sqrt[3]{{i}^{7}} \cdot \frac{1}{36}\right)\right) \cdot \sqrt[3]{i + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(i \cdot i\right)}}{i} \le -4.115528159098888 \cdot 10^{-225}:\\ \;\;\;\;n \cdot 100 + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(\left(i \cdot 100\right) \cdot n\right)\\ \mathbf{elif}\;\left(\sqrt[3]{i + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(i \cdot i\right)} \cdot \left(n \cdot 100\right)\right) \cdot \frac{\left(\sqrt[3]{i} + \left(\sqrt[3]{{i}^{4}} \cdot \frac{1}{6} + \sqrt[3]{{i}^{7}} \cdot \frac{1}{36}\right)\right) \cdot \sqrt[3]{i + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(i \cdot i\right)}}{i} \le 3.704217697331561 \cdot 10^{-170}:\\ \;\;\;\;\frac{1 + {\left(\sqrt{1 + \frac{i}{n}}\right)}^{n}}{\sqrt[3]{\frac{i}{n \cdot 100}} \cdot \sqrt[3]{\frac{i}{n \cdot 100}}} \cdot \frac{{\left(\sqrt{1 + \frac{i}{n}}\right)}^{n} - 1}{\sqrt[3]{\frac{i}{n \cdot 100}}}\\ \mathbf{elif}\;\left(\sqrt[3]{i + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(i \cdot i\right)} \cdot \left(n \cdot 100\right)\right) \cdot \frac{\left(\sqrt[3]{i} + \left(\sqrt[3]{{i}^{4}} \cdot \frac{1}{6} + \sqrt[3]{{i}^{7}} \cdot \frac{1}{36}\right)\right) \cdot \sqrt[3]{i + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(i \cdot i\right)}}{i} \le 1.7815974963192015 \cdot 10^{+308}:\\ \;\;\;\;n \cdot 100 + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(\left(i \cdot 100\right) \cdot n\right)\\ \mathbf{else}:\\ \;\;\;\;\frac{{\left(\frac{i}{n}\right)}^{n} - 1}{\frac{i}{n \cdot 100}}\\ \end{array}\]

Error

Bits error versus i

Bits error versus n

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Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original47.1
Target46.8
Herbie14.3
\[100 \cdot \frac{e^{n \cdot \begin{array}{l} \mathbf{if}\;1 + \frac{i}{n} = 1:\\ \;\;\;\;\frac{i}{n}\\ \mathbf{else}:\\ \;\;\;\;\frac{\frac{i}{n} \cdot \log \left(1 + \frac{i}{n}\right)}{\left(\frac{i}{n} + 1\right) - 1}\\ \end{array}} - 1}{\frac{i}{n}}\]

Derivation

  1. Split input into 4 regimes
  2. if (* (/ (* (cbrt (+ i (* (* i i) (+ (* 1/6 i) 1/2)))) (+ (+ (* 1/6 (cbrt (pow i 4))) (* (cbrt (pow i 7)) 1/36)) (cbrt i))) i) (* (cbrt (+ i (* (+ (* i 1/6) 1/2) (* i i)))) (* 100 n))) < -1.770573189712183e+308

    1. Initial program 13.3

      \[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}}\]
    2. Initial simplification13.3

      \[\leadsto \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{100 \cdot n}}\]
    3. Using strategy rm
    4. Applied div-inv13.4

      \[\leadsto \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\color{blue}{i \cdot \frac{1}{100 \cdot n}}}\]
    5. Applied add-cube-cbrt13.4

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

      \[\leadsto \color{blue}{\frac{\sqrt[3]{{\left(1 + \frac{i}{n}\right)}^{n} - 1} \cdot \sqrt[3]{{\left(1 + \frac{i}{n}\right)}^{n} - 1}}{i} \cdot \frac{\sqrt[3]{{\left(1 + \frac{i}{n}\right)}^{n} - 1}}{\frac{1}{100 \cdot n}}}\]
    7. Simplified13.5

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

    if -1.770573189712183e+308 < (* (/ (* (cbrt (+ i (* (* i i) (+ (* 1/6 i) 1/2)))) (+ (+ (* 1/6 (cbrt (pow i 4))) (* (cbrt (pow i 7)) 1/36)) (cbrt i))) i) (* (cbrt (+ i (* (+ (* i 1/6) 1/2) (* i i)))) (* 100 n))) < -4.115528159098888e-225 or 3.704217697331561e-170 < (* (/ (* (cbrt (+ i (* (* i i) (+ (* 1/6 i) 1/2)))) (+ (+ (* 1/6 (cbrt (pow i 4))) (* (cbrt (pow i 7)) 1/36)) (cbrt i))) i) (* (cbrt (+ i (* (+ (* i 1/6) 1/2) (* i i)))) (* 100 n))) < 1.7815974963192015e+308

    1. Initial program 60.1

      \[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}}\]
    2. Initial simplification60.1

      \[\leadsto \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{100 \cdot n}}\]
    3. Taylor expanded around 0 25.5

      \[\leadsto \frac{\color{blue}{i + \left(\frac{1}{2} \cdot {i}^{2} + \frac{1}{6} \cdot {i}^{3}\right)}}{\frac{i}{100 \cdot n}}\]
    4. Simplified25.5

      \[\leadsto \frac{\color{blue}{i + \left(i \cdot i\right) \cdot \left(\frac{1}{6} \cdot i + \frac{1}{2}\right)}}{\frac{i}{100 \cdot n}}\]
    5. Using strategy rm
    6. Applied *-un-lft-identity25.5

      \[\leadsto \frac{i + \left(i \cdot i\right) \cdot \left(\frac{1}{6} \cdot i + \frac{1}{2}\right)}{\color{blue}{1 \cdot \frac{i}{100 \cdot n}}}\]
    7. Applied *-un-lft-identity25.5

      \[\leadsto \frac{\color{blue}{1 \cdot \left(i + \left(i \cdot i\right) \cdot \left(\frac{1}{6} \cdot i + \frac{1}{2}\right)\right)}}{1 \cdot \frac{i}{100 \cdot n}}\]
    8. Applied times-frac25.5

      \[\leadsto \color{blue}{\frac{1}{1} \cdot \frac{i + \left(i \cdot i\right) \cdot \left(\frac{1}{6} \cdot i + \frac{1}{2}\right)}{\frac{i}{100 \cdot n}}}\]
    9. Simplified25.5

      \[\leadsto \color{blue}{1} \cdot \frac{i + \left(i \cdot i\right) \cdot \left(\frac{1}{6} \cdot i + \frac{1}{2}\right)}{\frac{i}{100 \cdot n}}\]
    10. Simplified8.3

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

    if -4.115528159098888e-225 < (* (/ (* (cbrt (+ i (* (* i i) (+ (* 1/6 i) 1/2)))) (+ (+ (* 1/6 (cbrt (pow i 4))) (* (cbrt (pow i 7)) 1/36)) (cbrt i))) i) (* (cbrt (+ i (* (+ (* i 1/6) 1/2) (* i i)))) (* 100 n))) < 3.704217697331561e-170

    1. Initial program 28.7

      \[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}}\]
    2. Initial simplification28.8

      \[\leadsto \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{100 \cdot n}}\]
    3. Using strategy rm
    4. Applied add-cube-cbrt28.8

      \[\leadsto \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\color{blue}{\left(\sqrt[3]{\frac{i}{100 \cdot n}} \cdot \sqrt[3]{\frac{i}{100 \cdot n}}\right) \cdot \sqrt[3]{\frac{i}{100 \cdot n}}}}\]
    5. Applied add-sqr-sqrt28.8

      \[\leadsto \frac{{\color{blue}{\left(\sqrt{1 + \frac{i}{n}} \cdot \sqrt{1 + \frac{i}{n}}\right)}}^{n} - 1}{\left(\sqrt[3]{\frac{i}{100 \cdot n}} \cdot \sqrt[3]{\frac{i}{100 \cdot n}}\right) \cdot \sqrt[3]{\frac{i}{100 \cdot n}}}\]
    6. Applied unpow-prod-down28.8

      \[\leadsto \frac{\color{blue}{{\left(\sqrt{1 + \frac{i}{n}}\right)}^{n} \cdot {\left(\sqrt{1 + \frac{i}{n}}\right)}^{n}} - 1}{\left(\sqrt[3]{\frac{i}{100 \cdot n}} \cdot \sqrt[3]{\frac{i}{100 \cdot n}}\right) \cdot \sqrt[3]{\frac{i}{100 \cdot n}}}\]
    7. Applied difference-of-sqr-128.8

      \[\leadsto \frac{\color{blue}{\left({\left(\sqrt{1 + \frac{i}{n}}\right)}^{n} + 1\right) \cdot \left({\left(\sqrt{1 + \frac{i}{n}}\right)}^{n} - 1\right)}}{\left(\sqrt[3]{\frac{i}{100 \cdot n}} \cdot \sqrt[3]{\frac{i}{100 \cdot n}}\right) \cdot \sqrt[3]{\frac{i}{100 \cdot n}}}\]
    8. Applied times-frac28.8

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

    if 1.7815974963192015e+308 < (* (/ (* (cbrt (+ i (* (* i i) (+ (* 1/6 i) 1/2)))) (+ (+ (* 1/6 (cbrt (pow i 4))) (* (cbrt (pow i 7)) 1/36)) (cbrt i))) i) (* (cbrt (+ i (* (+ (* i 1/6) 1/2) (* i i)))) (* 100 n)))

    1. Initial program 31.2

      \[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}}\]
    2. Initial simplification31.3

      \[\leadsto \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{100 \cdot n}}\]
    3. Taylor expanded around inf 46.6

      \[\leadsto \frac{\color{blue}{e^{\left(\log \left(\frac{1}{n}\right) - \log \left(\frac{1}{i}\right)\right) \cdot n} - 1}}{\frac{i}{100 \cdot n}}\]
    4. Simplified24.0

      \[\leadsto \frac{\color{blue}{{\left(\frac{i}{n}\right)}^{n} - 1}}{\frac{i}{100 \cdot n}}\]
  3. Recombined 4 regimes into one program.
  4. Final simplification14.3

    \[\leadsto \begin{array}{l} \mathbf{if}\;\left(\sqrt[3]{i + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(i \cdot i\right)} \cdot \left(n \cdot 100\right)\right) \cdot \frac{\left(\sqrt[3]{i} + \left(\sqrt[3]{{i}^{4}} \cdot \frac{1}{6} + \sqrt[3]{{i}^{7}} \cdot \frac{1}{36}\right)\right) \cdot \sqrt[3]{i + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(i \cdot i\right)}}{i} \le -1.770573189712183 \cdot 10^{+308}:\\ \;\;\;\;\left(\left(n \cdot 100\right) \cdot \sqrt[3]{{\left(1 + \frac{i}{n}\right)}^{n} - 1}\right) \cdot \frac{\sqrt[3]{{\left(1 + \frac{i}{n}\right)}^{n} - 1} \cdot \sqrt[3]{{\left(1 + \frac{i}{n}\right)}^{n} - 1}}{i}\\ \mathbf{elif}\;\left(\sqrt[3]{i + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(i \cdot i\right)} \cdot \left(n \cdot 100\right)\right) \cdot \frac{\left(\sqrt[3]{i} + \left(\sqrt[3]{{i}^{4}} \cdot \frac{1}{6} + \sqrt[3]{{i}^{7}} \cdot \frac{1}{36}\right)\right) \cdot \sqrt[3]{i + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(i \cdot i\right)}}{i} \le -4.115528159098888 \cdot 10^{-225}:\\ \;\;\;\;n \cdot 100 + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(\left(i \cdot 100\right) \cdot n\right)\\ \mathbf{elif}\;\left(\sqrt[3]{i + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(i \cdot i\right)} \cdot \left(n \cdot 100\right)\right) \cdot \frac{\left(\sqrt[3]{i} + \left(\sqrt[3]{{i}^{4}} \cdot \frac{1}{6} + \sqrt[3]{{i}^{7}} \cdot \frac{1}{36}\right)\right) \cdot \sqrt[3]{i + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(i \cdot i\right)}}{i} \le 3.704217697331561 \cdot 10^{-170}:\\ \;\;\;\;\frac{1 + {\left(\sqrt{1 + \frac{i}{n}}\right)}^{n}}{\sqrt[3]{\frac{i}{n \cdot 100}} \cdot \sqrt[3]{\frac{i}{n \cdot 100}}} \cdot \frac{{\left(\sqrt{1 + \frac{i}{n}}\right)}^{n} - 1}{\sqrt[3]{\frac{i}{n \cdot 100}}}\\ \mathbf{elif}\;\left(\sqrt[3]{i + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(i \cdot i\right)} \cdot \left(n \cdot 100\right)\right) \cdot \frac{\left(\sqrt[3]{i} + \left(\sqrt[3]{{i}^{4}} \cdot \frac{1}{6} + \sqrt[3]{{i}^{7}} \cdot \frac{1}{36}\right)\right) \cdot \sqrt[3]{i + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(i \cdot i\right)}}{i} \le 1.7815974963192015 \cdot 10^{+308}:\\ \;\;\;\;n \cdot 100 + \left(i \cdot \frac{1}{6} + \frac{1}{2}\right) \cdot \left(\left(i \cdot 100\right) \cdot n\right)\\ \mathbf{else}:\\ \;\;\;\;\frac{{\left(\frac{i}{n}\right)}^{n} - 1}{\frac{i}{n \cdot 100}}\\ \end{array}\]

Runtime

Time bar (total: 1.0m)Debug logProfile

herbie shell --seed 2018217 
(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))))