1-22 Operating the TI-82 STATS
82STAT~3.DOC TI-83 international English Bob Fedorisko Revised: 10/28/05 12:11 PM Printed: 10/28/05 12:11
PM Page 22 of 24
The Equation Operating System (EOSé) defines the order in
which functions in expressions are entered and evaluated on the
TI-82 STATS. EOS lets you enter numbers and functions in a
simple, straightforward sequence.
EOS evaluates the functions in an expression in this order:
1 Single-argument functions that precede the argument,
such as
‡(, sin(, or log(
2 Functions that are entered after the argument, such as
2
,
M1
, !, ¡,
r
, and conversions
3 Powers and roots, such as 2^5 or 5
x
‡32
4 Permutations (nPr) and combinations (nCr)
5 Multiplication, implied multiplication, and division
6 Addition and subtraction
7 Relational functions, such as > or
8 Logic operator and
9 Logic operators or and xor
Within a priority level, EOS evaluates functions from left to
right.
Calculations within parentheses are evaluated first.
Multiargument functions, such as
nDeriv(A
2
,A,6), are evaluated
as they are encountered.
Equation Operating System (EOSé)
Order of
Evaluation
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