HP 49g+ - Manual (Page 71)

Page 3-18
between quotes that contain that local variable, and show the evaluated
expression.
To activate the function in ALG mode, type the name of the function followed
by the argument between parentheses, e.g.,
@@@H@@@ „Ü2`. Some
examples are shown below:
In the RPN mode, to activate the function enter the argument first, then press
the soft menu key corresponding to the variable name
@@@H@@@ . For example,
you could try: 2`@@@H@@@ . The other examples shown above can be
entered by using: 1.2`@@@H@@@ , 2/3`@@@H@@@ .
Reference
Additional information on operations with real numbers with the calculator is
contained in Chapter 3 of the User’s Manual.