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Within a priority level, EOS
evaluates functions from left
to right.
Multi-argument functions,
such as
, are
nDeriv(A2,A,6)
evaluated as they are
encountered.
TI-86 implied multiplication
rules differ from those of the
TI-85. For example, the TI-86
evaluates
as
,
1à2x
(1à2)¹x
while the TI-85 evaluates
as
.
1à2x
1à(2¹x)
Equation Operating System (EOS™)
The Equation Operating System (EOS) governs the order of evaluation on the TI-86.
Calculations within parentheses are evaluated first, and then EOS evaluates functions
within an expression in this order:
1st
Functions that are entered after the argument, such as
2nd
Powers and roots, such as
3rd
Single-argument functions that precede the argument, such as
4th
Permutations (
nPr
5th
Multiplication, implied multiplication, and division
6th
Addition and subtraction
7th
Relational functions, such as
8th
Logic operator
and
9th
Logic operators
or
Implied Multiplication
The TI-86 recognizes implied multiplication, so you need not press M to express
multiplication in all cases. For example, the TI-86 interprets
implied multiplication.
Parentheses
All calculations inside a pair of parentheses are completed
first. For example, in the expression
inside the parentheses first, and then multiplies
1+2
x
‡32
2^5
or
5
) and combinations (
nCr
)
or
>
and
xor
, EOS evaluates
4(1+2)
Appendix
2
M1
r
, !, ¡,
,
, and conversions
‡(
,
, or
sin(
,
,
2p
4sin(46)
5(1+2)
by
.
3
4
397
log(
, and
¹
as
(2
5)7
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