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Texas Instruments TI-84 Plus Silver Edition Manual

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Chapter 1: Getting Started with the TI-84 Plus C Silver Edition 17
EOS™ evaluates the functions in an expression in this order.
Note: Within a priority level, EOS™ evaluates functions from left to right. Calculations within
parentheses are evaluated first.
Implied Multiplication
The TI-84 Plus C recognizes implied multiplication, so you need not press ¯ to express multiplication in
all cases. For example, the TI-84 Plus C interprets
2p, 4sin(46), 5(1+2), and (2…5)7 as implied
multiplication.
Note: TI-84 Plus C implied multiplication rules differ from those of some other graphing calculators. For
example, the TI-84 Plus C evaluates
1à2X as (1à2)…X, while some graphing calculators may evaluate
1à2X as 1à(2…X) (Chapter 2 in the guidebook).
Parentheses
All calculations inside a pair of parentheses are completed first. For example, in the expression 4(1+2),
EOS™ first evaluates the portion inside the parentheses, 1+2, and then multiplies the answer, 3, by 4.
Negation
To enter a negative number, use the negation key. Press Ì and then enter the number. On the
TI-84 Plus C, negation is in the third level in the EOS™ hierarchy. Functions in the first level, such as
squaring, are evaluated before negation.
Order
Number
Function
1 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
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
5
x
32
… 24 …


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