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If f (x)= tan ^(-1) (sgn (n ^(2) -lamda ...

If `f (x)= tan ^(-1) (sgn (n ^(2) -lamda x+1))` has exactly one point of discontinuity, then the value of `lamda ` can be:

A

1

B

`-1`

C

2

D

`-2`

Text Solution

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The correct Answer is:
C, D
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VIKAS GUPTA (BLACK BOOK)-CONTINUITY, DIFFERENTIABILITY AND DIFFERENTIATION-EXERCISE (ONE OR MORE THAN ONE ANSWER IS/ARE CORRECT)
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