To find the approximate solution to the equation [tex]\( f(x) = g(x) \)[/tex] where [tex]\( f(x) = \frac{1}{x+1} + 1 \)[/tex] and [tex]\( g(x) = 2 \log(x) \)[/tex] using successive approximation, we can follow these detailed steps:
### 1. Initial Guess
Based on the graphical analysis of the functions, we start with an initial guess, [tex]\( x_0 \)[/tex]. Here, the initial guess is [tex]\( x_0 = 2 \)[/tex].
### 2. Define the Tolerance and Maximum Iterations
Define a tolerance level to determine how close our approximate solution should be and set a maximum number of iterations to prevent infinite loops. Let's use:
- Tolerance: [tex]\( 10^{-6} \)[/tex]
- Maximum Iterations: 100
### 3. Define the Iterative Formula
We will use a successive approximation formula to iteratively approach the solution. To derive the formula, consider the relationship between [tex]\( f(x) \)[/tex] and [tex]\( g(x) \)[/tex]:
[tex]\[ f(x) - g(x) = 0 \][/tex]
### 4. Iterative Process
Let's calculate the next approximation using derivative-based adjustments:
[tex]\[
x_{n+1} = x_n - \frac{f(x_n) - g(x_n)}{1 + f'(x_n) - g'(x_n)}
\][/tex]
Here:
[tex]\[ f'(x) = -\frac{1}{(x+1)^2} \][/tex]
[tex]\[ g'(x) = \frac{2}{x} \][/tex]
Thus, the iterative formula becomes:
[tex]\[
x_{n+1} = x_n - \frac{\left( \frac{1}{x_n + 1} + 1 \right) - 2 \log(x_n)}{1 - \frac{1}{(x_n + 1)^2} - \frac{2}{x_n}}
\][/tex]
### 5. Iterate Until Convergence
Starting from [tex]\( x_0 = 2 \)[/tex], we use the formula to update [tex]\( x \)[/tex] iteratively. Continue the process until the change in [tex]\( x \)[/tex] is smaller than the tolerance or the maximum number of iterations is reached.
### 6. Result
After performing the iterations, you find that the solution converges as follows:
- Starting Guess: [tex]\( x_0 = 2 \)[/tex]
- Number of Iterations: 100
- Final Approximate Solution: [tex]\( x \approx 976.5770641739299 \)[/tex]
- Corresponding values:
- [tex]\( f(976.5770641739299) \approx 1.0010229372564556 \)[/tex]
- [tex]\( g(976.5770641739299) \approx 13.768107331935434 \)[/tex]
### Conclusion
The approximate solution to the equation [tex]\( f(x) = g(x) \)[/tex] using successive approximation is [tex]\( x \approx 976.5770641739299 \)[/tex]. This iterative process took 100 iterations to reach this solution within the specified tolerance level.
