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If f(x)={{:(1 ,if "x is reational"),(-1,...

If `f(x)={{:(1 ,if "x is reational"),(-1, if "x is irrational"):}`then `Lt_(x to 1+)(f(x)= `

A

R

B

`phi`

C

`(-1,1)`

D

`R^(+)`

Text Solution

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The correct Answer is:
B
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