- #1

damightytom

- 17

- 0

**1. Solve the differential equation**

y=10, dy/dx=0 when x=0

z=15, dz/dx=0 when x=0

d2y/dx2 = - 2y/3 + (z – y)/3

d2z/dx2 = -(z – y)

plot y,z,dydx,dzdx doe x=0->10

## Homework Equations

I am having trouble getting my head around the problem.

I need help setting a variable for dy/dx and dz/dx in my function for ODE45 to find the value.

## The Attempt at a Solution

So after setting up my script as such

[y z] = ode45('fun',[0 10], vekt);

vekt being the vector for all values at x=0

I need to set up my function so ODE has something to work with.

I know what to do when I have d/dx in the equation since you can set dy/dx = z and then d2y/dx2 = y'. But now I have a value for dydx at x=0 but I don't have that in the equation.

So I'm at a loss.

Anyone can give me any pointers?