Let f : ( - 1, 1 ) â†’ B be a function defined by f ( x ) = 2 1 – McqOptions

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1.	Let f : ( - 1, 1 ) â†’ B be a function defined by f ( x ) = 2 1 x 1 2x tan - - , then f is both one-one and onto when B is the interval
A.	(0,Ï€/2)
B.	(0,(-Ï€)/2)
C.	(Ï€/2,(-Ï€)/2)
D.	((-Ï€)/2,Ï€/2)
Answer» E.

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