HP 39g Graphing Calculator - Manual (Page 30)

Mathematical calculations
The most commonly used math operations are available from
the keyboard. Access to the rest of the math functions is via
the MATH menu
(|TTvrHl).
To access programming commands, press | SHIFT | CMOS. See
“Programming commands” on page 15-14 for further
information.
Where to start
Entering
expressions
Example
The home base for the calculator is the HOME view
(I HOME i). You can do all calculations here, and you can
access all |
math
| operations.
• Enter an expression into the HP 39G/40G in the same
left-to-right order that you would write the expression.
This is called algebraic entry.
• To enter functions, select the key or MATH menu item
for that function. You can also enter a function by using
the Alpha keys to spell out its name.
Press I ENTER I to evaluate the expression you have in the
edit line (where the blinking cursor is). An expression
can contain numbers, functions, and variables.
,2
Calculate
23^ 1478
-3
ln(45):
(I]23[i!]
014
0[sHiFTlV 8Q]
SED3
045 Q]
gra^^FUNCTIDNS
i23S-14*T8)T-3*LN<45)
-620.996104305
ENTER
Long results
If the result is too long to fit on the display line, or if you want
to see an expression in textbook format, press [0 to highlight
it and then press I
Negative
numbers
Type I (-) I to start a negative number or to insert a negative
sign.
To raise a negative number to a power, enclose it in
parentheses. For example, (-5)" = 25, whereas -5^ = -25.
1-18 Getting started