(3x2一6x十4)/(x2一3x十2)

2个回答

  • (3x²一6x十4)/(x²一3x十2)<1

    (3x²一6x十4)/(x²一3x十2)-1<0

    【(3x²一6x十4)-(x²一3x十2)】/(x²一3x十2)<0

    (2x²一3x十2)/(x²一3x十2)<0

    (2x²一3x十2)/(x-1)(x-2)<0

    2x²一3x十2

    =2(x²-1.5x+0.5625)+0.875

    =2(x-0.75)²>0

    不等式(2x²一3x十2)/(x-1)(x-2)<0两边同时除以(2x²一3x十2),不等号方向不变

    1/(x-1)(x-2)<0

    即(x-1)(x-2)<0且x≠1、x≠2

    所以不等式解集:x∈(1,2)