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4-Participant

## Multiplication using

Hi. In my book about mathcad i have a formula (upper image), and i was try write this formula in mathcad (lower image). But result does not match. Maybe i lose some arguments?

1 ACCEPTED SOLUTION

Accepted Solutions
21-Topaz I
(To:GLeBaTi)

Hi,

the value in brackets when "i" = 1 is 0.  Multiply anything including a large number of products is zero.

set the limits of the product from i=2 to n.

Cheers Terry

20 REPLIES 20
21-Topaz I
(To:GLeBaTi)

Hi,

the value in brackets when "i" = 1 is 0.  Multiply anything including a large number of products is zero.

set the limits of the product from i=2 to n.

Cheers Terry

21-Topaz II
(To:GLeBaTi)

Hi,

The produttoria must start from 2 to get as a result 1/2

4-Participant
(To:GLeBaTi)

Oh. Thanks! Maybe this book hame misspellings 🙂

24-Ruby V
(To:GLeBaTi)

@GLeBaTi wrote:

Oh. Thanks! Maybe this book hame misspellings 🙂

Obviously it has 😉

In Mathcad or Prime you can also use a shorter (but mathematical somewhat sloppy) notation:

23-Emerald III
(To:GLeBaTi)

Luc

4-Participant
(To:LucMeekes)

original book maybe not have misspelling.

I am reading the book in pdf format what have scan errors 🙂

23-Emerald III
(To:GLeBaTi)

From 0 to 1/2 or from 2 to 1 is too different to be a 'scan error'....

Again: what's the book?

Luc

4-Participant
(To:LucMeekes)
24-Ruby II
(To:GLeBaTi)

Page 18 contains correct text and wrong formula.

Martin Hanák
24-Ruby V
(To:GLeBaTi)

@GLeBaTi wrote:

http://static1.ozone.ru/multimedia/book_file/1009545514.pdf

Formula in PAGE 18(29)

A few lines above you see that its meant starting with i=2:

23-Emerald III
(To:Werner_E)

To get this (appearance of) symbolic output in Mathcad they must have done some work:

either define the value of 2 to a variable the name of which appears to be 1, or

it was a picture cut and paste.

Luc

23-Emerald I
(To:LucMeekes)

@LucMeekes wrote:

To get this (appearance of) symbolic output in Mathcad they must have done some work:

either define the value of 2 to a variable the name of which appears to be 1, or

it was a picture cut and paste.

Luc

Exactly right!  Involves a key combination not available in Prime:

23-Emerald III
(To:Fred_Kohlhepp)

There should be a way to pull this trick in communication with my bank. Imagine how I then could easily double the deposits, or halve the withdrawals.

Luc

24-Ruby V
(To:Fred_Kohlhepp)

I don't think that what we see in the pdf is a real screenshot of a Mathcad expression. Rather it was typeset in the printing house and the typesetter made a mistake.

23-Emerald I
(To:Werner_E)

not typesetting!

24-Ruby V
(To:Fred_Kohlhepp)

Yes, I know that a look alike can be done in Mathcad, but I was talking about the pdf of that book. If I look at the typeface used, the size of the product character Pi in relation to the other characters I don't think that we see a screen shot here and guess it was rather typeset (with an error).

BTW, we could also fake that in Prime, too:

20-Turquoise
(To:Werner_E)

23-Emerald III
(To:ttokoro)

That result should be undetermined, rather than 1/2.

Luc

24-Ruby V
(To:LucMeekes)

@LucMeekes wrote:

That result should be undetermined, rather than 1/2.

Luc

We are just playing around to reproduce the typo in the russian pdf and other similar nonsense using Mathcad or prime tricks which Valery would like 😉

18-Opal
(To:ttokoro)

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