HP 39gs Keyboard functions

!For a description, see “COMB(5,2) returns 10. That is, there are ten different ways that five things can be combined two at a time.!” on page 13-12.

∑

EEX

∫

x–1

For a description, see “Σ” on page 13-11.

For a description, see “Scientific notation (powers of 10)” on page 1-20.

For a description, see “ ∫ ” on page 11-7.

The multiplicative inverse function finds the inverse of a square matrix, and the multiplicative inverse of a real or complex number. Also works on a list containing only these object types.

Keyboard functions

	The most frequently used functions are available directly
	from the keyboard. Many of the keyboard functions also
	accept complex numbers as arguments.
, , ,	Add, Subtract, Multiply, Divide. Also accepts complex
	numbers, lists and matrices.
	value1+ value2, etc.
ex	Natural exponential. Also accepts complex numbers.
	e^value
	Example
	e^5 returns 148.413159103
	Natural logarithm. Also accepts complex numbers.
	LN(value)
	Example
	LN(1) returns 0

Using mathematical functions 13-3