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Consider the function f: R 0,1 such that f(x)= array cc 1 & if x is rational 0 & if x is irrational array . Which one of the following is correct?

Options

  1. AThe function is one-one into
  2. BThe function is many-one into
  3. CThe function is one-one onto
  4. DThe function is many-one onto

Correct answer

D. The function is many-one onto

Step-by-step solution

The correct answer is option (D).

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