Question about Casio FX-115ES Scientific Calculator

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It's the key marked 1^-1, just to the right and below the big circular cursor pad, above the log key.

Posted on Mar 21, 2011

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Posted on Jan 02, 2017

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Once you create a non-singular square matrix, have its name displayed on the command line then press the reciprocal key.

May 04, 2014 | Casio FX-115ES Scientific Calculator

The Casio FX-570MS does not handle matrices. So you cannot create matrices, let alone invert them. Sorry.

The Casio FX115 ES handles matrices for up to 3X3 dimension. Create the matrix.Have its name displayed on the command line and press the [x^-1] (reciprocal ) key.

The Casio FX115 ES handles matrices for up to 3X3 dimension. Create the matrix.Have its name displayed on the command line and press the [x^-1] (reciprocal ) key.

Apr 16, 2014 | Casio FX-115ES Scientific Calculator

It's the shifted function of the x^-1 key, located just below and right of the big round cursor pad, above the log key.

Feb 17, 2013 | Casio FX-115ES Scientific Calculator

For the reciprocal of a number, enter the number then press the key marked with an x^-1. You might have to use the SHIFT key first. For inverse of trigonometric functions use the SHIFT key followed by the function name. The inverse of LN is e^x. The inverse of log is 10^x. To calculate the inverse of a matrix, enter the name of the (already created) square matrix then press x^-1.

Jan 09, 2012 | Casio FX-115ES Scientific Calculator

Not all matrices are invertible. The matrice must be square.The matrix must be non-singular: Its determinant must be different from 0. Your error comes probably from the key you used to calculate the inverse. Use the reciprocal key, the one marked with x^-1. If the marking is not ON the key, use the SHIFT button prior to pressing the relevant key.

Sep 04, 2011 | Casio FX-115ES Scientific Calculator

The reciprocal key (1/X) is the key labelled as X to the power minus one: X^-1

or:

____

' -1 '

'X '

or:

____

' -1 '

'X '

Jul 19, 2011 | Casio FX-115ES Scientific Calculator

It's the key marked "x superscript -1", just right of and below the big circular cursor pad.

Jul 11, 2011 | Casio fx-300ES Calculator

The absolute value button is "SHIFT", "Abs" (located on the "hyp" key)

Apr 07, 2009 | Casio FX-115ES Scientific Calculator

x + 1) = 7

Oct 28, 2008 | Casio FX-115ES Scientific Calculator

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