Question: How do I Input to dsolve another Output of dsolve?

Hello,

 

I am having probrems to do the following.

 

- I want to solve 2 equations A and B, which have to be solved numerically. (get x(t) and y(y))


- With the solution to A and B, I have to input a combination into other equation C. And then get the solution for other variable. (solve z''(t) + (k/t^2 + V(x(t),y(t))z(t)=0)

 

I could solve evertything togewther. The only problem is that the second part I have to repeat it many times for differents values of a parameter (k). So if I solve the first part all the time, it takes really long.

 

IS THERE NOT A WAY TO USE THE OUTPUT OF A AND B AS AN INPUT OF C?

thanks in advance!

Santiago

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