Definite Integrals "Evaluated At"

[hastern]

how do we make the "evaluated at" symbol?  I don't care if it actually evaluates, but I'd like to display it on a notes page.

I don't see it in the "math templates" or the "symbols palette."

[Nevil Hopley]

Are you referring to the vertical line symbol that looks like this: |

For example x^2|x=3 returns 9.

You can access it by pressing CTRL then =

Nevil

[hastern]

Nevil:

That's almost it.  But I want the upper value at the top of the line, and the lower value at the bottom.

Maybe this is only a US notation.

 

Howard

[Nevil Hopley]

Hang on.....

I've just re-read your posting and seen the 'definite integrals' context bit!

So, I guess you want something that's not the definite integral sign template, but rather 'evaluate the difference of the expression when you substitute in the limits shown'?

This bit of code gives the answer to, say, evaluating the integrand of x^2 between 3 and 4:

ΔList(x^(2)|x={3,4})

(the first command is: 'deltalist' and can be accessed from the catalogue)

Ok, it doesn't look like what's normally written by hand, but it processes it the same way.

However, this still may not be what you wanted.....

Nevil

[Nevil Hopley]

Hi Howard

The notation you describe is not just for USA.

It's effectively like a bracket like this: ] with 2 numbers after it - one placed superscript and one placed subscript.

So, we need 2 separate elements with different formatting, one directly above the other.

A fraction template has a line in the way.

A vector template has brackets in the way.

Sorry, but I don't think it can be done at present, but it's only a matter of time before TI may consider including such 'super-pretty print' in a future OS version.

Nevil

PS for 'bracket', read 'parenthesis' when outside the UK!

[Marc Garneau]

We say 'bracket' in Canada too... eh

Marc

[hastern]

We say "bracket" for the square ones in the USA.  Just the crescent ones are called "parenthesis."

But, either way, I understand -- I'm bilingual in English and English. (maybe from the years I spent working in L10N and I18N)

 

Howard