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    Maths-
    General
    Easy

    Question

    Let f to the power of ´ end exponent be an injective function with domain left curly bracket x comma y comma z right curly bracket and range left curly bracket 12 comma 3 right curly bracket such that exactly one of the following statements is correct and the remaining are flase f left parenthesis x right parenthesis equals 1, f left parenthesis y right parenthesis not equal to 1 comma f left parenthesis z right parenthesis not equal to 2 the value of f to the power of negative 1 end exponent (1) is

    1. x    
    2. y    
    3. z    
    4. N o n e    

    The correct answer is: y

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