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Section 11: Calculating With Complex Numbers 129

Entering a Pure Imaginary Number

There is a shortcut for entering a pure imaginary number into the X-register

when you are already in Complex mode: key in the (imaginary) number and

press ´ }

Example: Enter 0 + 10i (assuming the last function executed was not −

or `.

Keystrokes

Display

Keys 10 into the displayed

real X-register and zero into

the imaginary X-register.

´ }

0.0000

Exchanges numbers in real

and imaginary X-registers.

Display again shows that the

number in the real X-

should be for a pure

imaginary number.

The operation of the real and imaginary stacks during this process is

illustrated below. (Assume the stack registers contain the numbers resulting

from the preceding examples.)

144

Keys:

´}

(Continue with

any operation.)

Note that pressing ´ } simply exchanges the numbers in the real

and imaginary X-registers and not those in the remaining stack registers.

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HP 15C Bedienungsanleitung Seite 129