\[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}}\]
Test:
Compound Interest
Bits:
128 bits
Bits error versus i
Bits error versus n
Time: 9.6 s
Input Error: 23.1
Output Error: 0.5
Log:
Profile: 🕒
\(\begin{cases} 100 \cdot \frac{e^{\log_* (1 + \frac{i}{n}) \cdot n} - 1}{\frac{i}{n}} & \text{when } i \le -0.0027293395f0 \\ 100 \cdot {\left(\frac{(i * \left(\frac{1}{2} \cdot i\right) + i)_* \cdot n}{i}\right)}^{1} & \text{when } i \le 0.2738785f0 \\ 0 & \text{otherwise} \end{cases}\)

    if i < -0.0027293395f0

    1. Started with
      \[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}}\]
      10.9
    2. Using strategy rm
      10.9
    3. Applied add-exp-log to get
      \[100 \cdot \frac{{\color{red}{\left(1 + \frac{i}{n}\right)}}^{n} - 1}{\frac{i}{n}} \leadsto 100 \cdot \frac{{\color{blue}{\left(e^{\log \left(1 + \frac{i}{n}\right)}\right)}}^{n} - 1}{\frac{i}{n}}\]
      10.9
    4. Applied pow-exp to get
      \[100 \cdot \frac{\color{red}{{\left(e^{\log \left(1 + \frac{i}{n}\right)}\right)}^{n}} - 1}{\frac{i}{n}} \leadsto 100 \cdot \frac{\color{blue}{e^{\log \left(1 + \frac{i}{n}\right) \cdot n}} - 1}{\frac{i}{n}}\]
      10.9
    5. Applied simplify to get
      \[100 \cdot \frac{e^{\color{red}{\log \left(1 + \frac{i}{n}\right) \cdot n}} - 1}{\frac{i}{n}} \leadsto 100 \cdot \frac{e^{\color{blue}{\log_* (1 + \frac{i}{n}) \cdot n}} - 1}{\frac{i}{n}}\]
      2.3

    if -0.0027293395f0 < i < 0.2738785f0

    1. Started with
      \[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}}\]
      29.6
    2. Applied taylor to get
      \[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}} \leadsto 100 \cdot \frac{\left(\frac{1}{2} \cdot {i}^2 + \left(1 + i\right)\right) - 1}{\frac{i}{n}}\]
      26.8
    3. Taylor expanded around 0 to get
      \[100 \cdot \frac{\color{red}{\left(\frac{1}{2} \cdot {i}^2 + \left(1 + i\right)\right)} - 1}{\frac{i}{n}} \leadsto 100 \cdot \frac{\color{blue}{\left(\frac{1}{2} \cdot {i}^2 + \left(1 + i\right)\right)} - 1}{\frac{i}{n}}\]
      26.8
    4. Applied simplify to get
      \[\color{red}{100 \cdot \frac{\left(\frac{1}{2} \cdot {i}^2 + \left(1 + i\right)\right) - 1}{\frac{i}{n}}} \leadsto \color{blue}{(i * \left(\frac{1}{2} \cdot i\right) + i)_* \cdot \frac{100}{\frac{i}{n}}}\]
      8.1
    5. Applied taylor to get
      \[(i * \left(\frac{1}{2} \cdot i\right) + i)_* \cdot \frac{100}{\frac{i}{n}} \leadsto 100 \cdot \frac{(i * \left(\frac{1}{2} \cdot i\right) + i)_* \cdot n}{i}\]
      0.0
    6. Taylor expanded around 0 to get
      \[\color{red}{100 \cdot \frac{(i * \left(\frac{1}{2} \cdot i\right) + i)_* \cdot n}{i}} \leadsto \color{blue}{100 \cdot \frac{(i * \left(\frac{1}{2} \cdot i\right) + i)_* \cdot n}{i}}\]
      0.0
    7. Using strategy rm
      0.0
    8. Applied pow1 to get
      \[100 \cdot \color{red}{\frac{(i * \left(\frac{1}{2} \cdot i\right) + i)_* \cdot n}{i}} \leadsto 100 \cdot \color{blue}{{\left(\frac{(i * \left(\frac{1}{2} \cdot i\right) + i)_* \cdot n}{i}\right)}^{1}}\]
      0.1

    if 0.2738785f0 < i

    1. Started with
      \[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}}\]
      19.4
    2. Applied taylor to get
      \[100 \cdot \frac{{\left(1 + \frac{i}{n}\right)}^{n} - 1}{\frac{i}{n}} \leadsto 100 \cdot 0\]
      0
    3. Taylor expanded around 0 to get
      \[100 \cdot \color{red}{0} \leadsto 100 \cdot \color{blue}{0}\]
      0
    4. Applied simplify to get
      \[\color{red}{100 \cdot 0} \leadsto \color{blue}{0}\]
      0

  1. Removed slow pow expressions

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))))