HP Prime Graphing NW280AAABA manual Sample calculations, Re-using, Results, SzX3, Method

bottom. In RPN mode, your history is ordered chronologically by default, but you can change the order of the items in history. (This is explained in “Manipulating the stack” on page 51.)

Re-using	There are two ways to re-use a result in history. Method 1
results	deselects the copied result after copying; method 2 keeps the
	copied item selected.
	Method 1
	1.	Select the result to be copied. You can do this by pressing
		=or \until the result is highlighted, or by tapping on it.
	2.	Press E. The result is copied to the entry line and is
		deselected.
	Method 2
	1.	Select the result to be copied. You can do this by pressing
		=or \until the result is highlighted, or by tapping on it.
	2.	Tap	and select ECHO. The result is copied to the

entry line and remains selected.

Note that while you can copy an item from the CAS history to use in a Home calculation (and copy an item from the Home history to use in a CAS calculation), you cannot copy items from or to the RPN history. You can, however, use CAS commands and functions when working in RPN mode.

Sample calculations

The general philosophy behind RPN is that arguments are placed before operators. The arguments can be on the entry line (each separated by a space) or they can be in history. For example, to multiply π by 3, you could enter:

SzX3

on the entry line and then enter the operator (s). Thus your entry line would look like this before entering the operator:

Reverse Polish Notation (RPN) 49