Getting Acquainted — Read This First!

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IAbout this User’s Guide

SModel-specific Function and Screen Differences

This User’s Guide covers multiple different calculator models. Note that some of the functions described here may not be available on all of the models covered by this User’s Guide. All of the screen shots in this User’s Guide show the fx-9860GɉSD screen, and the appearance of the screens of other models may be slightly different.

SMath natural input and display

Under its initial default settings, the fx-9860GɉSD, fx-9860Gɉ, or fx-9860G AU PLUS is set up to use the “Math input/output mode”, which enables natural input and display of math expressions. This means you can input fractions, square roots, differentials, and other expressions just as they are written. In the “Math input/output mode”, most calculation results also are displayed using natural display.

You also can select a “Linear input/output mode” if you like, for input and display of calculation expressions in a single line. The initial default setting of the fx-9860Gɉ SD, fx- 9860Gɉ, and fx-9860G AU PLUS input/output mode is the Math input/output mode.

The examples shown in this User’s Guide are mainly presented using the Linear input/output mode. Note the following points if you are using an fx-9860GɉSD, fx-9860Gɉ, or fx-9860G

AU PLUS.

•For information about switching between the Math input/output mode and Linear input/ output mode, see the explanation of the “Input/Output” mode setting under “Using the Setup Screen” (page 1-26).

•For information about input and display using the Math input/output mode, see “Using the Math Input/Output Mode” (page 1-10).

SFor owners of models not equipped with a Math input/output mode (fx-7400Gɉ, fx-9750Gɉ)...

The fx-7400Gɉand fx-9750Gɉdo not include a Math input/output mode. When performing the calculations in this manual on these models, use the linear input mode.

fx-7400Gɉand fx-9750Gɉowners should ignore all explanations in this manual concerned with the Math input/output mode.

SV()

The above indicates you should press and then V, which will input a symbol. All multiple-key input operations are indicated like this. Key cap markings are shown, followed by the input character or command in parentheses.

SKEQUA

This indicates you should first press K, use the cursor keys (D, A, B, C) to select the EQUA mode, and then press U. Operations you need to perform to enter a mode from the Main Menu are indicated like this.

SFunction Keys and Menus

•Many of the operations performed by this calculator can be executed by pressing function keys through . The operation assigned to each function key changes according to

v