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20060301
2-8-18
Using the Action Menu
u
gcd
Function: Returns the greatest common denominator of two expressions.
Syntax: gcd (Exp/List-1, Exp/List-2 [
)
]
Example: To obtain the greatest common denominator of
x
+ 1 and
x
2
– 3
x
– 4
Menu Item: [Action][Calculation][gcd]
u
fMax
Function: Returns the maximum point in a specific range of a function.
Syntax: fMax(Exp[,variable] [ ) ]
fMax(Exp,variable,start value,end value[,
n
] [ ) ]
• “
x
” is the default when you omit “[,variable]”.
• Negative infinity and positive infinity are the default when the syntax fMax (Exp [,
variable] [ ) ] is used.
• “
n
” is calculation precision, which you can specify as an integer in the range of 1 to 9.
Using any value outside this range causes an error.
• This command returns an approximate value when calculation precision is specified for
“
n
”.
• This command returns a true value when nothing is specified for “
n
”. If the true value
cannot be obtained, however, this command returns an approximate value along with
n
= 4.
• Discontinuous points or sections that fluctuate widely can adversely affect precision or
even cause an error.
• Inputting a larger number for “
n
” increases the precision of the calculation, but it also
increases the amount of time required to perform the calculation.
• The value you input for the end point of the interval must be greater than the value you
input for the start point. Otherwise an error occurs.
Example: To find the maximum point of –
x
2
+ 1 with respect to
x
Menu Item: [Action][Calculation][fMax]
Example: To find the maximum point of –
x
2
+ 1, when 2
<
x
<
5
Menu Item: [Action][Calculation][fMax]
Example: To find the maximum point of
x
3
– 6
x
with respect to
x
,
when –2
<
x
<
2 and
n
= 1
Menu Item: [Action][Calculation][fMax]