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Question: The signum (or sign) function, denoted by


The signum (or sign) function, denoted by sgn, is defined by




The signum (or sign) function, denoted by sgn, -1


a. Sketch the graph of this function.
b. Find each of the following limits or explain why it does not exist.




The signum (or sign) function, denoted by sgn, -2






Transcribed Image Text:

-1 if x<0 0 if x= 0 1 if x>0 sgn x = (i) lim sgn x x0+ (ii) lim sgn x X0- (iii) lim sgn x (iv) lim | sgn x|

1.99

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