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Black Book Advanced Problems in MathematicsMathematicsFunctions

Let f : R R be a function defined by f(x) = e^ |x| - e^ -x e^x + e^ -x , then

Options

  1. Af(x) is many one, onto function
  2. Bf(x) is many one, into function
  3. Cf(x) is decreasing function x R
  4. Df(x) is bijective function

Correct answer

B. f(x) is many one, into function

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