Question 1

Given the IVP

y⁽¹⁾(t) = 1 - 0.25 y(t) + 0.2 t
y(0) = 1

approximate y(0.5), y(1), and y(1.5) using 4th-order Runge-Kutta.

Answer: 1.376499430, 1.755761719, 2.137469483.

Question 2

Given the same ODE as in Question 1, but with the initial condition y(1) = 2, approximate y(1.5) and y(2.0).

Answer: 2.352998861 and 2.711523438