HP 39gs - Manual (Page 155)

Using mathematical functions 13-3
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.
e
x
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
!
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.
∑
For a description, see “Σ” on
page 13-11.
EEX
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.
∫ ∫
x
1 –
HP 39gs English.book Page 3 Wednesday, December 7, 2005 11:24 PM