## 1511 Reputation

8 years, 339 days

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## With MMA...

With MMA I was able to solve  double integral.

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## Workaround....

It's seems Maple dosen't know the answer.With workaround:

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## Try Explore...

Try:

Explore(plots:-implicitplot(y^2 = a*x^3 + b*x^2 + c*x + d, x = -5 .. 5, y = -5 .. 5, gridrefine = 2, view = [-5 .. 5, -5 .. 5]), a = -5 .. 5, b = -5 .. 5, c = -5 .. 5, d = -5 .. 5);

## Try:...

```func := 2*omega^2*B[1]*Zeta*omega[0] - omega^3*B[1]*I + omega*B[1]*omega[0]^2*I - 2*I*B[0]*Zeta*omega*omega[0] - B[0]*omega^2 + B[0]*omega[0]^2;

(evalc(func) assuming (B[0] in real, omega[0] in real, omega in real, Zeta in real, B[1] in real));

#2*omega^2*B[1]*Zeta*omega[0] - B[0]*omega^2 + B[0]*omega[0]^2 + (-2*Zeta*omega*B[0]*omega[0] - omega^3*B[1] + omega*B[1]*omega[0]^2)*I```

## You can find x in terms of y(x) using so...

You can find x in terms of y(x) using fsolve command.Analytical solution is  impossible.

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## Only approximation....

This is Abel diff equation and I doubt there's a closed form for this differential equation.I checked this PDF and I did not find any solution.

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## Maybe like this.See  in attached fi...

Maybe like this.See  in attached file.

## Exact numbers:...

Using identify command:

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## Use...

Use ":=" not "=" defining sys.

sys := {1800*40 + 15*300*30 - 30*Biy = 0, -1800 + Biy + Ciy - 300*30 = 0};

solve(sys, {Biy, Ciy});

#{Biy = 6900, Ciy = 3900}

fsolve(sys);

{Biy = 6900, Ciy = 3900}

## Workaround....

In Maple fourier transform is weak and  Maple can't find it ,thats wee need a workaround.

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## By numeric...

I doubt there's a closed form(symbolic solution) for the Inverse Laplace.

```I do not have the source of the code and the author who made it available,because I do not remember which web-page I copied from.
```

With numeric Inverse Laplace:

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## Yes...

Yes,MAPLE have capabability to do multidimensional FTs,but is very weak.

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## simplify(evala(f))...

```simplify(evala(f)) assuming x>0

#1/(sinh(x)*cosh(x))```

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