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Calculator Community => TI Calculators => General Calculator Help => Topic started by: Andre on April 10, 2011, 07:29:07 am

Title: How to display an equation the way I want
Post by: Andre on April 10, 2011, 07:29:07 am

Is there any way to display an equation the way I want, instead of the way my nspire wants?

For example:

(http://img10.imageshack.us/img10/562/unledx.png) (http://img10.imageshack.us/i/unledx.png/)

Uploaded with ImageShack.us (http://imageshack.us)

Title: Re: How to display an equation the way I want
Post by: ZippyDee on April 10, 2011, 07:29:40 am

the image is not showing

Title: Re: How to display an equation the way I want
Post by: Andre on April 10, 2011, 07:30:23 am

Fixed the img link

Title: Re: How to display an equation the way I want
Post by: Munchor on April 10, 2011, 07:31:36 am

Quote from: Andre on April 10, 2011, 07:29:07 am

Is there any way to display an equation the way I want, instead of the way my nspire wants?

For example:

(http://img10.imageshack.us/img10/562/unledx.png) (http://img10.imageshack.us/i/unledx.png/)

Uploaded with ImageShack.us (http://imageshack.us)

What do you mean? I have no problems with that, I love MathPrint.

Title: Re: How to display an equation the way I want
Post by: Andre on April 10, 2011, 07:34:23 am

The equation on the left is the one that I want to be displayed, just like that, but the nspire always "simplifies" to the one one the right

Title: Re: How to display an equation the way I want
Post by: Ashbad on April 10, 2011, 08:23:03 am

Well most likely it is being simplified like that is because most CAS systems won't put things under a root in the top of a fraction (since it's not officially correct that way) -- so really, it's helping you answer an extra step ;)

Title: Re: How to display an equation the way I want
Post by: Andre on April 10, 2011, 08:30:05 am

What if I dont want that help?

That was just an example, but I have huge equations that I need them to be displayed just the way I enter them. Is that possible?

(http://img217.imageshack.us/img217/956/26703552.png) (http://img217.imageshack.us/i/26703552.png/)

Uploaded with ImageShack.us (http://imageshack.us)

(http://img15.imageshack.us/img15/1696/33706541.png) (http://img15.imageshack.us/i/33706541.png/)

Uploaded with ImageShack.us (http://imageshack.us)

Title: Re: How to display an equation the way I want
Post by: Ashbad on April 10, 2011, 08:37:24 am

Well, one thing you can try is to group parts you want together in parenthesis, which might trick it into thinking it needs to show your equation first.

If that doesn't work, then I don't know -- but someone more familiarized with the Nspire might.

Title: Re: How to display an equation the way I want
Post by: apcalc on April 10, 2011, 08:44:58 am

As far as I know, I do not think that this is possible to do. :(

In some math, rationalizing the numerator as opposed to the denominator can be favorable.  I guess the CAS is going on this route before returning its answer.

Title: Re: How to display an equation the way I want
Post by: Andre on April 10, 2011, 08:59:03 am

Well if I create a Note and enter my equation in a mathbox it will be displayed the way I want (without evaluating it)

(http://img192.imageshack.us/img192/8104/56715625.png) (http://img192.imageshack.us/i/56715625.png/)

Uploaded with ImageShack.us (http://imageshack.us)

I want to be able to this but not in the Note page.

Title: Re: How to display an equation the way I want
Post by: Deep Toaster on April 10, 2011, 12:11:20 pm

Quote from: Ashbad on April 10, 2011, 08:23:03 am

Well most likely it is being simplified like that is because most CAS systems won't put things under a root in the top of a fraction (since it's not officially correct that way) -- so really, it's helping you answer an extra step ;)

It's actually been traditionally more correct to leave the root in the numerator instead, but I guess calculators don't need that anymore.

Title: Re: How to display an equation the way I want
Post by: Runer112 on April 10, 2011, 12:59:03 pm

I believe the reason the root is ending up in the denominator is simply because it's combining like terms. The √X in the numberator is being combined with the X in the denominator, giving √X in the denominator. I could be wrong, but that's my hypothesis at least.

Title: Re: How to display an equation the way I want
Post by: Deep Toaster on April 10, 2011, 01:14:59 pm

It's a valid simplification, but I don't think there's a valid way to keep it unsimplified, unfortunately. Maybe as a string?

Title: Re: How to display an equation the way I want
Post by: jnesselr on April 10, 2011, 01:27:24 pm

Yeah, it's just multiplying by sqrt(x)/sqrt(x) to get the x terms to cancel and get sqrt(x) in the bottom.  I would try parenthesis or something.

Title: Re: How to display an equation the way I want
Post by: Andre on April 10, 2011, 01:41:12 pm

parenthesis dont work because nspire just deletes useless parenthesis.