
Section 1: Getting Started26


The Yx function is also a twonumber
operation. It is used to raise numbers to powers, and you can use it in the
same simple way that you use every other twonumber function:



1.

Key in the first number.



2.

Press ENTER to separate the first number from
the second.



3.

Key in the second number (the power).



4.

Execute the function (press
g
Yx



When working with any function
(including Yx ),
you should remember that the displayed number is designated x by the function symbols.


So means square root of the displayed number,
1/x means 1/displayed number, etc.


Let's solve a problem using the Yx function.
Calculate 4^{7}:


4 _

4.0000

7 _

16,384.0000



Now try the following problems using the
Yx function, keeping in mind the simple
rules for twonumber functions:


65,536.0000

32,768.0000

6,561.0000



Chain Calculations


The speed and simplicity of operation of the HewlettPackard logic system
become most apparent during chain calculation. Even during the longest of
calculations, you still perform only one operation at a time, and you see
the results as you calculate—the HewlettPackard automatic memory
stack (covered in detail in
section 3) stores up to four intermediate
results inside the HP41C until you need them, then insert them into the
calculation. This system makes the process of working through a problem as
natural as it would be if you were working it out with pencil and paper;
but the calculator takes care of the hard part.
