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element
matrix, 181
ellipsis
at end of line, 19
in matrix row, 179
Else, 218, 306
e-mail address (TI Customer
Support), 392
End, 218, 290, 297, 306
Eng (engineering notation), 34,
20, 290
entry
executing, 19
storing to, 29
entry cursor, 18, 22, 23
[ENTRY] key, 19
ENTRY Storage Area, 28, 29
EOS. See Equation Operating
System
Eq4St( (equation to string), 227,
290
eqn (equation) variable, 54,
203, 205
EQU (equation variables), 43
equal (=), 290
equal to (==), 291
equation
entering, 203
evaluating, 122, 130
equation coefficients
storing to a variable, 210
equation editor, 74, 75, 76, 80
entering a function, 77
graph styles, 77
parametric, 126
polar, 118
Equation Editor menu, 76
Equation Operating System,
397
equation results
storing to a variable, 210
equation solver, 40, 202
graph tools, 207
equation storage
automatic regression, 191
equation variables, 40, 43, 78
equation-entry editor, 203
equations
editing, 205
solving, 206
error conditions, 393
error menu, 31
error message, 27
error type, 27
errors, 17, 27
correcting, 27
diagnosing, 27
from attached formulas, 165
EStep, 136
Euler method, 133, 291
eval, 52, 76, 88, 101, 122, 130,
150, 291
evalF(, 54, 292
evaluating a function for x, 101
evaluating equations, 122, 130
x
e
(constant e raised to a
power), 48
exact differentiation, 36
EXIT (cancel data
transmission), 241
exiting a menu, 6, 33
exp variable, 54, 203
EXPLR (explore), 148
exponent (å), 292
ExpR (exponential regression),
190, 293
expression, 18, 20, 24, 25, 26,
30, 48
editing, 4
entering, 24
409
Index
expression (continued)
entering a list, 153
evaluating, 29, 30
using a complex number, 71
using a vector, 172
using matrix, 181
F
factorial (!), 50, 294
Fahrenheit
converting to Celsius, 8
family of curves
graphing, 86
in parametric graphs, 129
in polar graphs, 120
fcstx (forecast x), 294
fcsty (forecast y), 294
feature symbol, 39
field formats, 134
Fill, 184
Fill(, 160, 173, 295
Fix, 295
FldOff (slope and direction
fields off), 134, 295
fldPic (field) variable, 138
Float, 35, 295
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