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Smile 發問時間: 社會及文化語言 · 1 個月前

Maths problem: how to do (b), thanks?

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  • SC147
    Lv 6
    1 個月前
    最佳解答

    3  ab

    -- = -------- , where a,b -- integers, a>b

    2  a-b 

       ab

    Since ----- is in its simplest form,

       a-b

    we have a-b=2 & ab=3.

    Now, when a-b=2,

    (a,b)=....,(-1,-3),(0,-2),(1,-1),(2,0),(3,1),(4,2),....

    But then ab=3, 

    ∴ (a,b)=(-1,-3),(3,1)  

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