Question about Texas Instruments TI-86 Calculator

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Hello,

There is a relation between roots and fractionary powers.

2nd root (square root) of X = X^(1/2) power 1/2

3rd root (cubic root) of X = X^(1/3) power 1/3

4th root of X = X^(1/4)

...

n-th root of X = X^(1/n)

Use the raise to arbitrary power key labeled as a caret [^] or [X to the y] or [Y to the x]

Hope it helps.

Posted on Oct 12, 2009

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Posted on Jan 02, 2017

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Sorry, but the fx-115ES can only display square roots in radical form. Cube roots are beyond its symbolic capabilities and will always be in decimal form.

Mar 08, 2013 | Texas Instruments TI-86 Calculator

That depends on how simple a calculator. I'll give some examples below for calculating the cube root of 8.

On a TI-86, press 3 2nd [MATH] F5 MORE F4 8 ENTER

If the calculator has a "^" or "y^x" key, raise 8 to the 1/3 power. Again, on the TI-86, press 8 ^ ( 1 / 3 ) ENTER

If the calculator has a logarithm key, take the logarithm, divide it by three, then take the antilogarithm. Again, on the TI-86, press 2nd [e^x] ( ln 8 / 3 ) ENTER

On a slide rule, place the hairline over the number on the K scale and read the cube root on the D scale.

On a TI-86, press 3 2nd [MATH] F5 MORE F4 8 ENTER

If the calculator has a "^" or "y^x" key, raise 8 to the 1/3 power. Again, on the TI-86, press 8 ^ ( 1 / 3 ) ENTER

If the calculator has a logarithm key, take the logarithm, divide it by three, then take the antilogarithm. Again, on the TI-86, press 2nd [e^x] ( ln 8 / 3 ) ENTER

On a slide rule, place the hairline over the number on the K scale and read the cube root on the D scale.

Jan 10, 2013 | Texas Instruments TI-86 Calculator

In the MATH MISC menu you'll find the xth-root function. Use this to find the 3rd root.

3 xth-root 8 ENTER will give 2.

3 xth-root 8 ENTER will give 2.

Sep 13, 2010 | Texas Instruments TI-86 Calculator

Use the root function in the MATH MISC menu.

To find the 5th root of 32: enter 5 then the root function and then 32 and then ENTER to get 2.

To find the 5th root of 32: enter 5 then the root function and then 32 and then ENTER to get 2.

Apr 06, 2010 | Texas Instruments TI-86 Calculator

To find the cubed root of say...8, then you would type this into the calculator:

root(8,3)

root(8,3)

Nov 02, 2009 | Texas Instruments TI-86 Calculator

look under math calc and there should be an x^3 key

Sep 29, 2009 | Texas Instruments TI-86 Calculator

Hello,

What we call roots: square, cube ,fourth roots, etc. can be shown in algebra to be equiavlent to powers with fractionary exponents where numerator is 1 and denomonator an integer.

**square root of a = a to the power 1/2**

**cube root of a = a to the power 1/3**

**n-th root of a = a raised to the power 1/n,** n integer different from 0.

How to use calculator to calculate cube root?

If you do not have a specific (shortcut) key for it you use the key to raise to an arbitrary power [^ ], sometimes shown as [x^y]. The exponent will be 1/3. Do not replace 1/3 by its decimal approximate.

Cube root of 27 is entered as**27 [^ ] (1/3)**

Hope it helps.

What we call roots: square, cube ,fourth roots, etc. can be shown in algebra to be equiavlent to powers with fractionary exponents where numerator is 1 and denomonator an integer.

How to use calculator to calculate cube root?

If you do not have a specific (shortcut) key for it you use the key to raise to an arbitrary power [^ ], sometimes shown as [x^y]. The exponent will be 1/3. Do not replace 1/3 by its decimal approximate.

Cube root of 27 is entered as

Hope it helps.

Sep 13, 2009 | Texas Instruments TI-86 Calculator

Cube root 27:

Put 3 then

Select 2nd MATH MISC MORE F4 27 ENTER

should equal 3.

Put 3 then

Select 2nd MATH MISC MORE F4 27 ENTER

should equal 3.

Mar 25, 2009 | Texas Instruments TI-86 Calculator

To find the cubed root (or any root) of a number, use the root() function.

If you want the cubed root of 125, you would type:

root(125,3)

If you want the cubed root of 125, you would type:

root(125,3)

Mar 06, 2009 | Texas Instruments TI-86 Calculator

Hello,

Use the general power key [^] to an exponent 1/3

Cube root of 27 is entered as follows 27[^](1/3)= 3

Hope it helps.

Use the general power key [^] to an exponent 1/3

Cube root of 27 is entered as follows 27[^](1/3)= 3

Hope it helps.

Feb 01, 2009 | Texas Instruments TI-86 Calculator

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