HP 48gII Graphing Calculator Manual de usuario descargar pdf (Pagina 128)

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Changing sign of a number, variable, or expression

Use the \ key. In ALG mode, you can press \ before entering the

number, e.g., \2.5`. Result = -2.5. In RPN mode, you need

to enter at least part of the number first, and then use the \ key, e.g.,

2.5\. Result = -2.5. If you use the \ function while there is no

command line, the calculator will apply the NEG function (inverse of sign) to

the object on the first level of the stack.

The inverse function

Use the Ykey. In ALG mode, press Y first, followed by a number or

algebraic expression, e.g., Y2. Result = ½ or 0.5. In RPN mode, enter

the number first, then use the key, e.g., 4`Y. Result = ¼ or 0.25.

Addition, subtraction, multiplication, division

Use the proper operation key, namely, + - * /. In ALG mode,

press an operand, then an operator, then an operand, followed by an ` to

obtain a result. Examples:

3.7 + 5.2 `

6.3 - 8.5 `

4.2 * 2.5 `

2.3 / 4.5 `

The first three operations above are shown in the following screen shot:

In RPN mode, enter the operands one after the other, separated by an `,

then press the operator key. Examples:

3.7` 5.2 +

6.3` 8.5 -

4.2` 2.5 *

2.3` 4.5 /

Alternatively, in RPN mode, you can separate the operands with a space

(#) before pressing the operator key. Examples:

3.7#5.2 +

6.3#8.5 -

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HP 48gII Graphing Calculator Manual de usuario Pagina 128

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