Question about Casio FX-115ES Scientific Calculator

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Using my Casio FX-115ES

What function do i use to figuar the Sq. Root

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Use the key that is 3 keys below the ALPHA button. You must press that key, then place the number or equation you are trying to get the square root of.

Posted on Apr 15, 2009

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Howe do I calculate F(x)= 3 to the power of the square root of (x-3). Specifically I am asking what keys I need to press.


The square root key has a marking that looks like the letter V. It usually is the shifted function of the square key (^2).
Note that nth-root is the same as power to the (1/n). See a few examples below.

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Jul 22, 2014 | Casio FX-115ES Scientific Calculator

1 Answer

I have a casio fx-115ES and I want to do a cube root without answering in decimal forms


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

1 Answer

How do i calculate my rational equations using my casio fx-115es for example x/8=8/x


You do not need a calculator for this proportion.
For a proportion a/b=c/d, the product of the extrems (a*d) is equal to the product of the means (b*c).
In your case x*x=8*8 or x^2=64.
The two solutions are x=+square root (64) or x=-square root(64).

For a less trivial equation, you can use the solve feature of the FX-119ES. To do so, use the ALPHA keyboard to enter your equation; once the equation is typed in, do not press the main equal sign, but the Solve key (the key is located near the top left corner of the keyboard). You will be prompted to solve for X?.

Feb 24, 2012 | Casio FX-115ES Scientific Calculator

1 Answer

How do I enter radicals with variables to solve?


Put the calculator in the COMP mode. Use the ALPHA key to enter the X symbol in the square roots: ALPHA [)] to type X. Use the ALPHA key to type in the = sign (ALPHA CALC). Compose your expression
Sqr(50*X)-Sqr(8*X)=1
While the equation is still on the command line, press SHIFT CALC to (SOLVE).
You will see Solve for X.
Press the = sign at the bottom right. Wait for the solution to appear.

Jan 31, 2012 | Casio FX-115ES Scientific Calculator

1 Answer

How to find cube root


Use the cube-root function, which is the shifted function of the square-root key (third row, second column). For example, to find the cube root of 8, press
SHIFT [cube-root] 8 =

Jul 09, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

How you find the cube root of a complex number (8,60degrees) on the Casio Fx-115ES


You can use the root functions even in COMPLEX Mode, but you cannot feed the root functions a number that is complex.k24674_57.jpg

The case you have given is easy enough to do by hand (see screen capture below.)

k24674_58.jpg

May 22, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

How does a cube root sign appear in calculator??


There is no cube root key on the fx-115ES. There is a general root function. It's the shifted function of the x^ key, just below and to the right of the big round key at the top of the keyboard, above the sin key. To find the cube root of 8:

In LineIO mode: press 3 SHIFT [root] 8 =

In MathIO mode: press SHIFT [root] 3 right-arrow 8 =

Dec 09, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

How do i find square root of a number on casio FX-115ES?


Press the square-root key (third row from the top, second column from the left). Type in the number and press =. If you get a symbolic result, press S-D to convert or else press SHIFT ENTER instead of ENTER. If you don't want to see any symbolic results, press SHIFT MODE 2 to switch to the LineIO mode.

Dec 05, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

How do I get an approximate answer instead of a radical?


press the [S<->D] button. it's directly above the DEL key.

Apr 22, 2009 | Casio FX-115ES Scientific Calculator

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