Question: The signum (or sign) function, denoted by sgn, is defined by (a) Sketch the graph of this function. (b) Find each of the following limits

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

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

(-1 if x

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