Consider the IVP { y' = 2y {y(0) = 1 a)

Answered question

2022-03-04

Consider the IVP
{ y' = 2y
{y(0) = 1
a) Find the exact solution of the IVP
b) Using step ℎ = 0.2, find an approximate solution of the PVI at point = 1.0
b1) Euler's method
b2) Improved Euler Method
b3) Fourth-order Runge-Kutta method
c) Compare the approximate solutions obtained in the previous items with the exact solution.

Answer & Explanation

RizerMix

RizerMix

Expert2023-04-23Added 656 answers

To find the exact solution of the IVP {y'=2y,{y(0)=1, we can start by separating the variables and then integrating both sides.

dydx=2y

dyy=2dx

Integrating both sides, we get:

ln|y|=2x+C1    (where C1 is the constant of integration)

To solve for y, we exponentiate both sides:

|y|=e2x+C1=e2xeC1

Since y(0)=1, we can substitute these values into our equation to solve for the constant of integration C1:

|1|=e20+C1=eC1

Taking the natural logarithm of both sides:

ln|1|=ln|eC1|

0=C1

Substituting this value back into our previous equation, we get:

|y|=e2x

Since y(0)=1, we know that y must be positive. Therefore, we can drop the absolute value bars and write the solution as:

y=e2x

Therefore, the exact solution of the IVP {y'=2y,{y(0)=1 is y=e2x.

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