Relations And Functions

  • Question

    State which of the following sets are finite, which are infinite : 

    (i) A = {x : x space space element of N,  and (x-1) (x - 2) = 0}

    (ii)  { x : x space space element of N and x= 25}

    (iii)  { x: xspace space element of space N, 2x-1  = 0}

    (iv)  { x : x space space element of N, x is prime}


    (i) finite
    (ii) Finite
    (iii) Finite
    (iv) Infinite
    (v)  Infinite

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