Integrate logs?

Questions
1

Hi all.

I am trying to integrate xlnx.dx, for x=2,4, but I get the output below. Why is the output just an expression of the integral? Why is the output not a numerical value? Thanks in advance.

log.JPG

2

On my system I get -3 + 7 Log[4] as output. Quit Mathematica and try again.

3

I have Mathematica 10.0.1.0 on Windows 8.1 and I have no problems with this expression.

rus.png
rus.png414×444 4.78 KB

There are several solutions:

1.Quit Mathematica and start again.

2.Enter

Clear["Global`*"]

3.Menu->Evaulation->Quit Kernel->Local

4

Thanks for the replies. I have tried all suggestions, and the output is still the same. :confused:

I have Mathematica 10.0.0 Student Edition, running in Windows 8.1 Professional.

5

Ah, I found the problem…“log” should have been “Log”. :slight_smile: