HP 48gII Graphing, 50g Graphing manual Abcuv, Abs, Ack

ABCUV

Type:	Command
Description:	Returns a solution in polynomials u and v of au+bv =c where a and b are polynomials in the
	current CAS independent variable, and c is a value.
Access:	Arithmetic, !ÞPOLYNOMIAL
Input:	Level 3/Argument 1: The polynomial corresponding to a.
	Level 2/Argument 2: The polynomial corresponding to b.
	Level 1/Argument 3: The value corresponding to c.
Output:	Level 2/Item 1: The solution corresponding to u.
	Level 1/Item 2: The solution corresponding to v.
Flags:	Exact mode must be set (flag –105 clear).
	Numeric mode must not be set (flag –3 clear).
	Radians mode must be set (flag –17 set).
Example:	Find a solution in polynomials u and v for the following equation:
	( x2 + x + 1)u + ( x2 + 4)V = 13
Command:	ABCUV(X^2+X+1,X^2+4,13)
Result:	{-(X+3),X+4}
See also:	IABCUV, EGCD
ABS	Function
Type:
Description:	Absolute Value Function: Returns the absolute value of its argument.
	ABS has a derivative (SIGN) but not an inverse.
	In the case of an array, ABS returns the Frobenius (Euclidean) norm of the array, defined as the
	square root of the sum of the squares of the absolute values of all n elements. That is:

n

∑

i = 1

zi 2

Access:	!Ê		( Ê is the leftshift of the	/key).
Flags:	Numerical Results (–3)
Input/Output:
		Level 1/Argument 1		Level 1/Item 1
		x	→	x
		(x,y)	→	x	2	+ y	2
		x_unit	→	x_unit
		[array]	→	array
		'symb'	→	'ABS(symb)'
See also:	NEG, SIGN
ACK	Command
Type:

Description: Acknowledge Alarm Command: Acknowledges the oldest pastdue alarm.

ACK clears the alert annunciator if there are both no other pastdue alarms and no other active alert sources (such as a low battery condition).

Full Command and Function Reference 35