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weeman
Joined: 15 May 2007
Posts: 6
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 Posted: May 15, 2007 10:40 AM Post subject: Can't find X |
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hey guys my friends have the Ti 83 and Ti 84 but i got the Ti89 and cant find 1 function  . Under ] at ti 89 there is something like a v i don't now the englisch name because im from holland.I want the function x and then the V thing does anybody now it?
Thanks in advance
Milad  |
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mellamokb
Joined: 10 May 2007
Posts: 100
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| Posted: May 17, 2007 9:40 AM Post subject: |
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Hi milad,
Please let me know if I'm misinterpreting anything you have told me.
You are wanting the xth root function (or radical) *\/¯¯(n), where * is the root (square, cubic, quartic, etc.)
There are two ways to accomplish this. If you want the fifth root of a number, you can take it to the one-fifth power (this works on the TI-83 and TI-84 too):
30^(1/5) = 1.97435048583
If you have a new enough TI-89, there is a function called "root(" that can take two arguments, the first being the value under the root symbol and the second being the xth root:
5*\/¯¯(30) = 30^(1/5) = root(30, 5) = 1.97435048583
Hope this helps!
~ mellamokb |
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weeman
Joined: 15 May 2007
Posts: 6
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| Posted: May 18, 2007 7:42 AM Post subject: |
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| mellamokb wrote: | Hi milad,
Please let me know if I'm misinterpreting anything you have told me.
You are wanting the xth root function (or radical) *\/¯¯(n), where * is the root (square, cubic, quartic, etc.)
There are two ways to accomplish this. If you want the fifth root of a number, you can take it to the one-fifth power (this works on the TI-83 and TI-84 too):
30^(1/5) = 1.97435048583
If you have a new enough TI-89, there is a function called "root(" that can take two arguments, the first being the value under the root symbol and the second being the xth root:
5*\/¯¯(30) = 30^(1/5) = root(30, 5) = 1.97435048583
Hope this helps!
~ mellamokb |
thank you thats the function i needed but when i typ root(30,5) on the ti 89 it just says the same thing again root (30. , 5.).My ti89 got the version 2.09 so its up to date
but thanks for the first way thats easy too^^ thank you for the help
Cya Milad |
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mellamokb
Joined: 10 May 2007
Posts: 100
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| Posted: May 18, 2007 9:24 AM Post subject: |
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Hi milad,
I think the two-argument "root(" function only comes on TI-89's with OS 3.00 or higher, which can only be found on a TI-89 Titanium.
~ mellamokb |
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weeman
Joined: 15 May 2007
Posts: 6
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| Posted: May 20, 2007 6:35 AM Post subject: |
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| mellamokb wrote: | Hi milad,
I think the two-argument "root(" function only comes on TI-89's with OS 3.00 or higher, which can only be found on a TI-89 Titanium.
~ mellamokb |
hey mellamokb
oke thank you for the information.I buyed the ti 89 in 1999 so its old but can i update my ti89 with the os of ti 89 titanium?
Milad |
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mellamokb
Joined: 10 May 2007
Posts: 100
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| Posted: May 20, 2007 9:07 PM Post subject: |
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Hi weeman,
Sorry, no you can't  . The TI-89 Titanium OS is not compatible with the TI-89 OS. The last time I used a TI-89, the newest OS was 2.09, compared to 3.10 for the TI-89 Titanium.
You could always define your own root function, though, and give it a different name than the built-in root function. For example, type this on the homescreen:
| Code: |
Define xroot(a,b)=a^(1/b)
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Anytime you want to perform a root, use this "xroot(" function instead of the built-in "root(" function and you can use two parameters like the TI-89 Titanium. The only disadvantage is that you will not get a pretty-print xth root function, like 5\/¯¯x; instead you will just get something like x^(1/5).
Hope this helps!
~ mellamokb |
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weeman
Joined: 15 May 2007
Posts: 6
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| Posted: May 22, 2007 10:10 AM Post subject: |
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| mellamokb wrote: | Hi weeman,
Sorry, no you can't . The TI-89 Titanium OS is not compatible with the TI-89 OS. The last time I used a TI-89, the newest OS was 2.09, compared to 3.10 for the TI-89 Titanium.
You could always define your own root function, though, and give it a different name than the built-in root function. For example, type this on the homescreen:
| Code: |
Define xroot(a,b)=a^(1/b)
|
Anytime you want to perform a root, use this "xroot(" function instead of the built-in "root(" function and you can use two parameters like the TI-89 Titanium. The only disadvantage is that you will not get a pretty-print xth root function, like 5\/¯¯x; instead you will just get something like x^(1/5).
Hope this helps!
~ mellamokb |
thanks mellamokb
you are a great help
cya Milad |
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