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| I have this expression: testsprog = DSolve[{feq, y[1] == 1}, y[x], x] That, upon evaluation, produces: {{y[x] -> 1/2 x Tan[2 (ArcTan[2]/2 + Log[x])]}} When I try to plot it using the command: [mcode]Plot[testsprog, {x,... |
| I'm trying to use DSolve to solve an initial value problem. I entered: DSolve[{y'[x] == (x^2 + x y[x] + 4 y[x]^2)/x^2, y[1] == 1}, y[x], x] That returns the error message:[mcode]DSolve::deqn: Equation or list of equations expected... |
| The following code also produces an echo, and I can't parse out why: DSolve[{y'[x] == (x^2 + x y[x] + 4 y[x]^2)/x^2, y[1] == 1}, y[x], x] |