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 2. Relevant 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. 3. 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?