Question

Find approximate value of y(1.0) for the initial value problem \begin{align*} y' =x-2y, y(0)=1 \end{align*} using Milne-Simpson's method y_{n+1} = y_{n-1} + \frac{h}{3}[f_{n+1} + 4f_{n} - f_{n-1}] 
with h=0.2. Calculate starting value using Runge-Kutta fourth order method with the same h.

15 Feb 2024
Answer :
Word Count : 458

To approximate the value of \( y(1.0) \) for the initial value problem \( y' = x - 2y \) with \( y(0) = 1 \) using Milne-Simpson's method and the Runge-Kutta fourth-order method, we follow these steps:

1. Calculate the starting value using the Runge-Kutta fourth-order method with \( h = 0.2 \).
2. Apply Milne-Simpson's method to find \( y(1.0) \) using the starting value obtained in step 1.

First, let's find the starting value using the Runge-Kutta fourth-order method:

The Runge-Kutta fourth-order method is given by:

\[
\begin{align*}
k_1 &= hf(x_n, y_n) \\
k_2 &= hf(x_n + \frac{h}{2}, y_n + \frac{k_1}{2}) \\
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