For all positive integers m, [m] = 3m when m is odd and [m]=1/2 when m is even. Which of the following is [...] - Uniperfect CALL ME BACK

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    For all positive integers m, [m] = 3m when m is odd and [m]=1/2 when m is even. Which of the following is […]

    For all positive integers m, [m] = 3m when m is odd and [m]=1/2 when m is even. Which of the following is equivalent to [9] × [6] ?

    A. [81]
    B. [54]
    C. [36]
    D. [27]
    E. [18]

    Λύση (D):

    [9] = 3×9=27 (εφόσον το 9 είναι περιττός αριθμός)

    [6]= 6/2=3

    Άρα [9] × [6] = 27× 3=81

    Επομένως ψάχνουμε ποια από τις επιλογές θα μας δώσει αντίστοιχα 81.

    [81]= 3×81=243

    [54]= 54/2 =27

    [36]= 36/2= 18

    [27]= 27×3 =81

    [18]= 18/2=9

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