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1-22 Operating the TI
-
83
8301OPER.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:09 PM Printed: 02/19/01 1:34
PM Page 22 of 24
The Equation Operating System (EOS
é
) defines the order
in which functions in expressions are entered and
evaluated on the TI
.
83. 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
,
M
1
, !,
¡
,
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 (EOS™)
Order of
Evaluation