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 (>0$7+@).

To access programming commands, press >6+,)7@ CMDS. See “Programming commands” on page 15-14 for further information.

Where to start The home base for the calculator is the HOME view (>+20(@). You can do all calculations here, and you can access all >0$7+@ operations.

Entering expressions

Example

Long results

Negative numbers

•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 >(17(5@ to evaluate the expression you have in the edit line (where the blinking cursor is). An expression can contain numbers, functions, and variables.

Calculate

232

– 14

8

ln(45) :

-------------------

– 3 --------

 

 

 

 

>￿@23>[￿, >￿@14 >;@>6+,)7@√ 8>￿@ >j@>￿￿￿@3 >OQ@45 >￿@ >(17(5@

If the result is too long to fit on the display line, or if you want to see an expression in textbook format, press *k, to highlight it and then press 6+2:a.

Type >￿￿￿@￿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) 2 = 25, whereas –5 2 = –25.

1-18

Getting started