Consider the differential equation y' = - 4xy with initial condition y(0) = 1.9. Recall that Runge-Kutta method has the following formula for computing the next step, where h is the step size: f(xi, Yi) = fx i + (++) k1 = h k2 2 ¯‚ Yi + k₁ h h k3 = fxi 2 `, Yi + k₂· 2 k4 = f(xi+h, yikзh) i+1=i+h k12k22k3 + k4 Yi+1 Yi + h 6 Using Runge-Kutta step size h = 0.4: Estimate y(0.4) ≈ help (numbers) Estimate y(0.8) ≈ help (numbers) Book: Section 1.7 of Notes on Diffy Qs

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Question
Consider the differential equation y'
=
- 4xy with initial condition y(0) = 1.9.
Recall that Runge-Kutta method has the following formula for computing the next step,
where h is the step size:
f(xi, Yi)
= fx i +
(++)
k1
=
h
k2
2
¯‚ Yi + k₁
h
h
k3
=
fxi
2
`, Yi + k₂·
2
k4
=
f(xi+h, yikзh)
i+1=i+h
k12k22k3 + k4
Yi+1
Yi +
h
6
Using Runge-Kutta step size h
=
0.4:
Estimate y(0.4) ≈
help (numbers)
Estimate y(0.8) ≈
help (numbers)
Book: Section 1.7 of Notes on Diffy Qs
Transcribed Image Text:Consider the differential equation y' = - 4xy with initial condition y(0) = 1.9. Recall that Runge-Kutta method has the following formula for computing the next step, where h is the step size: f(xi, Yi) = fx i + (++) k1 = h k2 2 ¯‚ Yi + k₁ h h k3 = fxi 2 `, Yi + k₂· 2 k4 = f(xi+h, yikзh) i+1=i+h k12k22k3 + k4 Yi+1 Yi + h 6 Using Runge-Kutta step size h = 0.4: Estimate y(0.4) ≈ help (numbers) Estimate y(0.8) ≈ help (numbers) Book: Section 1.7 of Notes on Diffy Qs
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