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Question

Find the point where the graph of the function Sgn (lnx) breaks (or becomes discontinuous)
(Sgn is the Signum function)


A

-1

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B

0

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C

1

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D

e

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Solution

The correct option is C

1


The graph of Sgn(x) is

It is discontinuous or breaks when x = 0

Sgn ( Inx) will be discontinuous (will break) when Inx = 0

or when x = 1 . Because that is when sgn(Inx) becomes zero.


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