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Hi, I tried to solve a differential equation by using DSolve. I set up the equation and executed it, but Mathematica just output the differential equation again without any error message. Does anyone know what happened? How could I solve this...
![Differential equation set][1] [1]: /c/portal/getImageAttachment?filename=pic44523.gif&userId=333203 I'd wonder if anyone can help me set up these differential equations. I don't know how to experss an derivative of a function calculated...