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Q. |
Let f : ( - 1, 1 ) → 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,π/2) |
B. | (0,(-π)/2) |
C. | (π/2,(-π)/2) |
D. | ((-π)/2,π/2) |
Answer» D. ((-π)/2,π/2) |
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