Message Boards Message Boards

0
|
2634 Views
|
4 Replies
|
0 Total Likes
View groups...
Share
Share this post:

Different results for same equality tests in Wolfram|Alpha?

Posted 1 year ago

Hello, I am new here, so I hope this is the right place.

Why are the outputs different:
Sequence A converges towards 1/2
Sequence B converges towards 0
But they are both the same: Equality Test

POSTED BY: Andre S
4 Replies

That's strange. If I make the same exact Wolfram|Alpha query from within Mathematica the answer comes out correct.

POSTED BY: Gianluca Gorni

There is a problem in sequence B when k=1, because the logarithm of 1 in base 1 is not defined. Try

NSum[Log[Sqrt[k], k], {k, 1, 3}]

This may be at the heart of the problem, but I don't know the exact mechanism.

POSTED BY: Gianluca Gorni
Posted 1 year ago

I haven't thought of this but for k=2 the problem persists, and

NSum[Log[Sqrt[k], k], {k, 2, 3}]

is defined

POSTED BY: Andre S

If I opened the right windows, the Wolfram|Alpha command had an overall 'divided by n,' while the Mathematica command didn't.

POSTED BY: Marvin Ray Burns
Reply to this discussion
Community posts can be styled and formatted using the Markdown syntax.
Reply Preview
Attachments
Remove
or Discard

Group Abstract Group Abstract