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After pressing `the calculator displays the expression:
√ (3.*(5.-1/(3.*3.))/23.^3+EXP(2.5))
Pressing `again will provide the following value (accept Approx mode on,
if asked, by pressing !! @ @OK#@):
You could also type the expression directly into the display without using the
equation writer, as follows:
to obtain the same result.
Change the operating mode to RPN by first pressing the H button. Select
the RPN operating mode by either using the \key, or pressing the @CHOOSE
soft menu key. Press the !!@@OK#@ F soft menu key to complete the operation.
The display, for the RPN mode looks as follows:
Notice that the display shows several levels of output labeled, from bottom to
top, as 1, 2, 3, etc. This is referred to as the stack of the calculator. The
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