Question about Texas Instruments TI-83 Plus Silver Edition Calculator

# I need some help please : )

I have a TI-83 Plus Silver Edition, I am doing square roots in math class and when I use the square root button an open parenthesis appears with the sq. root symbol. This is really messing up my answers when I need a decimal answer. Is there any way to get ride of this parenthesis?

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The parenthesis is there so u can put a number under the radicle. Just close the parenththesis once u put the number under the radicle

Posted on Nov 20, 2008

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1 Answer

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If you mean the fifth root, use the xth-root function (MATH 5). For example, to calculate the fifth root of 32, press 5 MATH 5 3 2 ENTER

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Two ways:

2ND [square-root] ( 8 7 . 3 4 / 5 ) ENTER

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The first sequence takes the square root of 87.34/5, the second sequence calculates 87.34/5 then takes the square root of the result.

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Use the xth-root function accessible by pressing MATH 5. For example, to find the third root of 8, press 3 MATH 5 8 ENTER.

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For example, to compute the 5th root of 32, press 5 MATH 5 3 2 ENTER.

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1 Answer

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1 Answer

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Press the MATH key to bring up the Math menu. Option 3 gives you cubed, option 4 gives you cube root, option 5 gives you nth root.

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3 Answers

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You can enter any root by typing the number, then hitting MATH and 5, which brings up the root symbol with the x in front of it: x√. So the fifth-root would be 5 -> MATH -> 5 and then whatever number you want to get the fifth-root for: 5x√10 for example. As someone else had mentioned, you can also raise it to a rational power: 3^(1/3) which would be the same as the cubed root of 3, but you could also type: 3 -> MATH -> 5 -> 3 and get the same answer, but looking like this in your calculator: 3x√3. The option for 4 actually is a predefined cubed-root, and the one for option 5 there is the root symbol that can be used with any number before it to get any root you want. There are no parenthesis as you get when using the predefined square-root and cubed-root functions, though, so you may want to type them in yourself if entering a long string of operations in the calculator at one time to make sure the calculator doesn't include numbers under the root that you don't want it to. But I guess it depends on preference in terms of what method you choose between the rational exponents or the root symbol (and most would go with whichever seems easiest and quickest to enter), but you asked specifically how to get the cubed-root on the TI-83 Plus, so there's my best attempt at answering your question.

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