Hp 49g Graphing Calculator Instrukcja Użytkownika Strona 170

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PREVAL
Type:
Function
Description:
With respect to the current default variable, returns the
difference between the values of a fimction at two
specified values of the variable.
PREVAL can be used in conjunction with INTVX to
evaluate definite integrals. See the example below.
Access: Calculus, 0(® DERIV. & INTEG.
Input:
Level 3/Ai'gument 1: A fimction.
Level 2/Argument 2: The lower boimd.
Level 3/Argiunent 1: The upper boimd.
The bounds can be expressions.
Output:
The result of the evaluation.
Flags:
Exact mode must be set (flag -105 clear).
Nmneric mode must not be set (flag -03 clear).
Example:
Evaluate the following;
r ^ 1
(x' + 3x)dx
Command:
PREVAL(INTVX(X"3+3*X),0,3)
Result: 135/4
PREVPRIME
Type: Function
Description:
Given an integer, finds the closest prime number smaller
than the integer.
Access:
Arithmetic, 0@TH) INTEGER
Input:
An integer.
Output:
The closest prime number smaller than the integer.
Flags:
Exact mode must be set (flag -105 clear).
Numeric mode must not be set (flag -03 clear).
Example:
Find the closest, smaller prime number to 145.
Command:
PREVPRIME(145)
Result:
139
Computer Algebra Commands
Page 14-47
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