Casio FA-123 Manual de usuario descargar pdf (Pagina 3)

fx-7400G Plus

The order of operations requires that you do all operations within

parentheses first, evaluate all powers second, multiply and divide from left

to right third, and add and subtract from left to right last.

Note 0C • Negation and Subtraction

Negation and subtraction are performed with different keys on this

calculator. Negation, , changes the sign of a number or a variable. It is

slightly shorter than the subtraction symbol. If you enter the wrong symbol,

you may get an error message.

In the order of operations, negation is treated like “multiply by negative 1,”

so it is performed before addition and subtraction but after evaluation

of powers. Sometimes you may need to use parentheses to get the

correct result.

Note 0D • Recursion

The Ans command on the calculator allows you to use the result of your

last calculation in your next calculation. If you press without pressing

another key, the calculator will repeat the last operation on the previous

result. Combining these two features allows you to perform on-screen

recursion, calculating a new number by repeating the operation using the

result of the previous calculation. To create patterns of numbers (sequences),

follow this procedure:

a. Enter the starting number of your sequence and press .

b. Enter an expression using

Ans. You can get Ans by pressing any of

theoperation keys,such as ,,,,,,or by pressing

[Ans].

c. Press and so on. Each time you press , you will get

one more term in the sequence.

EXEEXEEXEEXE

SHIFT



EXE

()

Note 0B • Exponents (continued) fx-7400G Plus

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Casio FA-123 Manual de usuario Pagina 3