\[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}}\]
Test:
Compound Interest
Bits:
128 bits
Bits error versus i
Bits error versus n
Time: 27.7 s
Input Error: 52.7
Output Error: 0.6
Log:
Profile: 🕒
\(\frac{e^{i \cdot \frac{1}{2}} \cdot \left(100 \cdot n\right)}{{\left(e^{\frac{1}{8}}\right)}^{\left(i \cdot i\right)}}\)
  1. Started with
    \[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}}\]
    52.7
  2. Applied taylor to get
    \[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}} \leadsto 100 \cdot \frac{\left(\frac{1}{2} \cdot {i}^2 + \left(1 + i\right)\right) - 1}{\frac{i}{n}}\]
    59.4
  3. Taylor expanded around 0 to get
    \[100 \cdot \frac{\color{red}{\left(\frac{1}{2} \cdot {i}^2 + \left(1 + i\right)\right)} - 1}{\frac{i}{n}} \leadsto 100 \cdot \frac{\color{blue}{\left(\frac{1}{2} \cdot {i}^2 + \left(1 + i\right)\right)} - 1}{\frac{i}{n}}\]
    59.4
  4. Applied simplify to get
    \[\color{red}{100 \cdot \frac{\left(\frac{1}{2} \cdot {i}^2 + \left(1 + i\right)\right) - 1}{\frac{i}{n}}} \leadsto \color{blue}{\left(\frac{1}{2} \cdot i + 1\right) \cdot \frac{i \cdot 100}{\frac{i}{n}}}\]
    25.3
  5. Using strategy rm
    25.3
  6. Applied add-exp-log to get
    \[\left(\frac{1}{2} \cdot i + 1\right) \cdot \frac{i \cdot 100}{\color{red}{\frac{i}{n}}} \leadsto \left(\frac{1}{2} \cdot i + 1\right) \cdot \frac{i \cdot 100}{\color{blue}{e^{\log \left(\frac{i}{n}\right)}}}\]
    45.3
  7. Applied add-exp-log to get
    \[\left(\frac{1}{2} \cdot i + 1\right) \cdot \frac{\color{red}{i \cdot 100}}{e^{\log \left(\frac{i}{n}\right)}} \leadsto \left(\frac{1}{2} \cdot i + 1\right) \cdot \frac{\color{blue}{e^{\log \left(i \cdot 100\right)}}}{e^{\log \left(\frac{i}{n}\right)}}\]
    55.3
  8. Applied div-exp to get
    \[\left(\frac{1}{2} \cdot i + 1\right) \cdot \color{red}{\frac{e^{\log \left(i \cdot 100\right)}}{e^{\log \left(\frac{i}{n}\right)}}} \leadsto \left(\frac{1}{2} \cdot i + 1\right) \cdot \color{blue}{e^{\log \left(i \cdot 100\right) - \log \left(\frac{i}{n}\right)}}\]
    55.4
  9. Applied add-exp-log to get
    \[\color{red}{\left(\frac{1}{2} \cdot i + 1\right)} \cdot e^{\log \left(i \cdot 100\right) - \log \left(\frac{i}{n}\right)} \leadsto \color{blue}{e^{\log \left(\frac{1}{2} \cdot i + 1\right)}} \cdot e^{\log \left(i \cdot 100\right) - \log \left(\frac{i}{n}\right)}\]
    55.4
  10. Applied prod-exp to get
    \[\color{red}{e^{\log \left(\frac{1}{2} \cdot i + 1\right)} \cdot e^{\log \left(i \cdot 100\right) - \log \left(\frac{i}{n}\right)}} \leadsto \color{blue}{e^{\log \left(\frac{1}{2} \cdot i + 1\right) + \left(\log \left(i \cdot 100\right) - \log \left(\frac{i}{n}\right)\right)}}\]
    55.4
  11. Applied simplify to get
    \[e^{\color{red}{\log \left(\frac{1}{2} \cdot i + 1\right) + \left(\log \left(i \cdot 100\right) - \log \left(\frac{i}{n}\right)\right)}} \leadsto e^{\color{blue}{\left(\log n + \log 100\right) + \log \left(i \cdot \frac{1}{2} + 1\right)}}\]
    44.0
  12. Applied taylor to get
    \[e^{\left(\log n + \log 100\right) + \log \left(i \cdot \frac{1}{2} + 1\right)} \leadsto e^{\left(\log n + \left(\log 100 + \frac{1}{2} \cdot i\right)\right) - \frac{1}{8} \cdot {i}^2}\]
    33.4
  13. Taylor expanded around 0 to get
    \[e^{\color{red}{\left(\log n + \left(\log 100 + \frac{1}{2} \cdot i\right)\right) - \frac{1}{8} \cdot {i}^2}} \leadsto e^{\color{blue}{\left(\log n + \left(\log 100 + \frac{1}{2} \cdot i\right)\right) - \frac{1}{8} \cdot {i}^2}}\]
    33.4
  14. Applied simplify to get
    \[e^{\left(\log n + \left(\log 100 + \frac{1}{2} \cdot i\right)\right) - \frac{1}{8} \cdot {i}^2} \leadsto \frac{n \cdot e^{\log 100}}{\frac{{\left(e^{\frac{1}{8}}\right)}^{\left(i \cdot i\right)}}{e^{\frac{1}{2} \cdot i}}}\]
    1.8

  15. Applied final simplification
  16. Applied simplify to get
    \[\color{red}{\frac{n \cdot e^{\log 100}}{\frac{{\left(e^{\frac{1}{8}}\right)}^{\left(i \cdot i\right)}}{e^{\frac{1}{2} \cdot i}}}} \leadsto \color{blue}{\frac{e^{i \cdot \frac{1}{2}} \cdot \left(100 \cdot n\right)}{{\left(e^{\frac{1}{8}}\right)}^{\left(i \cdot i\right)}}}\]
    0.6

Original test:


(lambda ((i default) (n default))
  #:name "Compound Interest"
  (* 100 (/ (- (pow (+ 1 (/ i n)) n) 1) (/ i n)))
  #:target
  (* 100 (/ (- (exp (* n (if (= (+ 1 (/ i n)) 1) (/ i n) (/ (* (/ i n) (log (+ 1 (/ i n)))) (- (+ (/ i n) 1) 1))))) 1) (/ i n))))