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#1 2007-07-09 19:43:26

cachemony
Member
Registered: 2007-07-09
Posts: 1

How would I enter this into ym TI-89?

How do you enter cube roots and radicals into the TI-89? I can't really give an example using the computer keyboard, so an example is on the following page:

http://www.realclearnews.com/math_test.html

Thanks,
Noah

Last edited by cachemony (2007-07-09 19:50:56)

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#2 2007-07-09 21:46:56

Identity
Member
Registered: 2007-04-18
Posts: 934

Re: How would I enter this into ym TI-89?

My math teacher told me that you can't enter cube roots as they are shown with the root sign in the TI-89.
If you want

, then you have to press ' x ^ (1 ÷ 3)'.

Last edited by Identity (2007-07-09 21:47:28)

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#3 2007-07-12 00:30:54

HallsofIvy
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Re: How would I enter this into ym TI-89?

Notice the PARENTHESES in x^(1÷ 3)!  They are essential. If you leave them off and use
x^1÷ 3, the calculator will interpret that as (x^1)÷(3) or just x/3.

#4 2007-07-12 15:33:20

John E. Franklin
Member
Registered: 2005-08-29
Posts: 3,588

Re: How would I enter this into ym TI-89?

This reminds me of when I fiddle with ratios of the musical notes; that is, their frequencies of vibration.
2 ^ (1/12)  is the ratio between semitones or chromatic steps, in an equally tempered scale.
Just plain 2 is the ratio between notes an octave apart.


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#5 2007-07-12 15:34:30

John E. Franklin
Member
Registered: 2005-08-29
Posts: 3,588

Re: How would I enter this into ym TI-89?

Refresh problem, double post removed.

Last edited by John E. Franklin (2007-07-12 15:38:44)


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