\[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}}\]
Test:
Compound Interest
Bits:
128 bits
Bits error versus i
Bits error versus n
Time: 11.3 s
Input Error: 61.8
Output Error: 5.6
Log:
Profile: 🕒
\(\frac{\frac{100}{1} + \left(\frac{100}{1} \cdot i\right) \cdot \left(i \cdot \frac{1}{6} + \frac{1}{2}\right)}{\frac{1}{n}}\)
  1. Started with
    \[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}}\]
    61.8
  2. Using strategy rm
    61.8
  3. Applied div-inv to get
    \[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\color{red}{\frac{i}{n}}} \leadsto 100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\color{blue}{i \cdot \frac{1}{n}}}\]
    61.8
  4. Applied *-un-lft-identity to get
    \[100 \cdot \frac{\color{red}{{\left(1 + \frac{i}{n}\right)}^{n} - 1}}{i \cdot \frac{1}{n}} \leadsto 100 \cdot \frac{\color{blue}{1 \cdot \left({\left(1 + \frac{i}{n}\right)}^{n} - 1\right)}}{i \cdot \frac{1}{n}}\]
    61.8
  5. Applied times-frac to get
    \[100 \cdot \color{red}{\frac{1 \cdot \left({\left(1 + \frac{i}{n}\right)}^{n} - 1\right)}{i \cdot \frac{1}{n}}} \leadsto 100 \cdot \color{blue}{\left(\frac{1}{i} \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{1}{n}}\right)}\]
    62.0
  6. Applied associate-*r* to get
    \[\color{red}{100 \cdot \left(\frac{1}{i} \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{1}{n}}\right)} \leadsto \color{blue}{\left(100 \cdot \frac{1}{i}\right) \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{1}{n}}}\]
    62.0
  7. Applied simplify to get
    \[\color{red}{\left(100 \cdot \frac{1}{i}\right)} \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{1}{n}} \leadsto \color{blue}{\frac{100}{i}} \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{1}{n}}\]
    62.0
  8. Applied taylor to get
    \[\frac{100}{i} \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{1}{n}} \leadsto \frac{100}{i} \cdot \frac{\frac{1}{2} \cdot {i}^2 + \left(i + \frac{1}{6} \cdot {i}^{3}\right)}{\frac{1}{n}}\]
    20.2
  9. Taylor expanded around 0 to get
    \[\frac{100}{i} \cdot \frac{\color{red}{\frac{1}{2} \cdot {i}^2 + \left(i + \frac{1}{6} \cdot {i}^{3}\right)}}{\frac{1}{n}} \leadsto \frac{100}{i} \cdot \frac{\color{blue}{\frac{1}{2} \cdot {i}^2 + \left(i + \frac{1}{6} \cdot {i}^{3}\right)}}{\frac{1}{n}}\]
    20.2
  10. Applied simplify to get
    \[\frac{100}{i} \cdot \frac{\frac{1}{2} \cdot {i}^2 + \left(i + \frac{1}{6} \cdot {i}^{3}\right)}{\frac{1}{n}} \leadsto \frac{100}{i} \cdot \frac{\left({i}^3 \cdot \frac{1}{6} + \left(i \cdot i\right) \cdot \frac{1}{2}\right) + i}{\frac{1}{n}}\]
    20.2

  11. Applied final simplification
  12. Applied simplify to get
    \[\color{red}{\frac{100}{i} \cdot \frac{\left({i}^3 \cdot \frac{1}{6} + \left(i \cdot i\right) \cdot \frac{1}{2}\right) + i}{\frac{1}{n}}} \leadsto \color{blue}{\frac{\frac{100}{1} + \left(\frac{100}{1} \cdot i\right) \cdot \left(i \cdot \frac{1}{6} + \frac{1}{2}\right)}{\frac{1}{n}}}\]
    5.6

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))))