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प्रश्न
Let f : R → R be a function defined by f(x) `= ("e"^abs"x" - "e"^-"x")/("e"^"x" + "e"^-"x")` then f(x) is
विकल्प
one-one onto
one-one but not onto
onto but not one-one
None of these
MCQ
उत्तर
None of these
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