Texas Instruments BA II Plus User Manual

1: Overview of Calculator Operations 15
More on Selected Math Operations
Universal Power
;
lets you raise a positive number to any power (2
.5
or 2
(1/3)
, for
example). However, you can raise a negative number only to an
integer power or the reciprocal of an odd number. In either
case, the power can be either positive or negative.
Parentheses
Parentheses let you control the order in which a numeric
expression is evaluated. The portion of an expression enclosed
in parentheses is evaluated separately. Up to 15 levels of
parentheses are available, with up to 8 pending operations.
If an expression would end in a series of closed parentheses
you can omit pressing
:
. Press
N
to close all of the
parentheses automatically, evaluate the expression, and display
the end result. To see intermediate results, press
:
repeatedly.
Factorial
To compute the factorial of a displayed number, press
& g
.
The number must be a positive integer

69.
Random Numbers
To generate a random real number between zero and one
(0<x<1) from a uniform distribution, press
& a
.
To repeat a sequence of random numbers, you must first store a
“seed” value in the random number generator. To store a seed
value, key in an integer greater than zero and press
D &
a
. This lets you recreate experiments by generating the
same series of random numbers.
Combinations
& s
computes the number of combinations of n items taken
r at a time.
nCr
n
nr r
=
−×
!
!!
()

Texas Instruments BA II Plus Specifications

General

Type	Financial
Cover	-
Form factor	Pocket
Control type	Buttons
Product color	Black
Digits	10 digits
Display tilting	No
Display number of lines	1 lines
Memory registers	10
Power source	Battery