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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 8: tìm giá trị để P=3x-1/2x+2 nguyên

Toán Lớp 8: tìm giá trị để P=3x-1/2x+2 nguyên

Comments ( 1 )

  1. Để P nguyên:
    3x-1vdots2x+2
    =>-1-2vdots2x-3x
    =>-3vdots-x
    =>3vdotsx
    =>x∈Ư(3)={+-3;+-1}
    Vậy P nguyên khi x∈Ư(3)={+-3;+-1}.

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222-9+11+12:2*14+14 = ? ( )