## 1401 Reputation

7 years, 163 days

## @Carl Love Yes ,you are absolutey r...

Yes ,you are absolutey right,Mathematica can't also expand derivatives.

Form here: http://functions.wolfram.com/HypergeometricFunctions/HypergeometricU/20/01/01/

we see that for: a parameter first derivative does not exist a closed-form solution.

## Mathematica solution:...

In Mathematica 12.1 HypergeometricU[1, 1, x] is the same as KummerU(1,1,x) in Maple.

## @muioxygen  If you want save files...

If you want save files *.mws to hard drive then: right click and save target as:

## Only numeric....

With complicated function probably only hope to get answer is use evalf(Int).

## @Christopher2222  and aac,opus for...

and aac,opus format.

## @Thomas Dean Code is not work for 2...

Code not work's for 2 variable?

## @permanoon123  See attached file. ...

See attached file.

Integral_new.mw

## MAPLE Weakness !!!...

Maple can't solve PDE with numerics.

## @JonMcLoone  When will we see the...

`When will we see the version 12.1 ?`

## Only comment....

Mathematica have only up to 2*10^14.

## @mahmood1800  For first question: ...

For first question:

You have 6  conditions:

1. f3(0,t)=-exp(-2*t)

2. f4(x,0)=exp(-3*x)*cos(2*Pi*x)

3. f1(x,3)=0

4. f1(3,t)=0

5. f2(x,3)=0

6. f2(3,t)=0

and we have a  5 constants,one condition is too much.

For second question:

No,is not true and not allowed.

Regards M.I

## @aabdulla  I don't know the a...

`I don't know the answer to your question. I'm just a regular user, not a MAPLE developer.`

## Syntax errors....

With corrected syntax I able to solve integral with Maple.

See attached file.

Integrals_Sheet2-BB.mw

## ?...

@Kitonum

eval(FR, [a = 0, b = 2, k = 2, l = 2]) # is Zero not TRUE ?

int(eval(sqrt(1 + k^2*Pi^2*cos(Pi*x/l)^2/l^2), [l = 2, k = 2]), x = 0 .. 2, numeric)#4.609785323 OK.

## You Can optimize gif so that the file wo...

You Can optimize gif so that the file would take up smaller capacity.

 4 5 6 7 8 9 10 Last Page 6 of 29
﻿