Mariusz Iwaniuk

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7 years, 115 days

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These are replies submitted by Mariusz Iwaniuk

@Alex0099 

Try Wolfram Alpha ?

@Alex0099 

It is clear and accurately conveys the information that Wolfram Alpha is based on the Mathematica engine, that it has step-by-step solutions available for a fee, and that the author is uncertain if step-by-step solutions work for double summations, as the author is not registered on the platform.

Cross post. in Mathematics site.

@Sayed 

Looks like fourier can't solve for: "sech(x)^3" and "tanh(x)*sech(x)^3".

Using comparision test from this video, we have:

0 <= (x + 2)/((2*x^3 + 1)*ln(x)) and (x + 2)/((2*x^3 + 1)*ln(x)) <= 1/ln(x)

int(1/ln(x), x = 1 .. infinity);

#infinity

It can be done only numerically.

a := 0;
b := 1;
int(exp(-1/sqrt(x^2 + 1)), x = a .. b, numeric);

#0.4160094117

 

If I execute your code Maple give me: "Error, mismatched or missing bracket/operator" .Please check your input for bad syntax?

@Viva 

I don't have any  suggestions ,because Maple can't solve solvelable integrals.

Maple is weak for solving  indefinite and define integrals.

2_ver2.mw

Mathematica 13.0 also can't integrate.

 

Better post this question to this webpage.

int(A,theta=0..eta)

@C_R 

The problem in Maple is: '"automatic simplification' and 'evaluation'".

See here , here and here.

Cross post here. and here

1.What you need PDEtools for that?

2.You want to solve a Nonlinear Volterra Integro Differential Equation ?, if yes post the equation.

 

I'm voting to close this question as off-topic because there is no well-posed question in this post; the OP is simply asking for somebody to act as a free coding service.

I'm voting to close this question as off-topic because there is no well-posed question in this post; the OP is simply asking for somebody to act as a free coding service.

This line of code dosen't work:

sum(sum((k[1]+3)!*((-1)^(k-k[1]-1)/2)*Y[k[1]+3]/(k[1]!*(k-k[1])!,k[1]=0..k)

?

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