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phongluyenvan2017
2 năm trước
bài 1: A=(x/x^2-4 + 1/x+2 - 2/x-2):(1-x/x+2) a, Rút gọn A b, Tính giá trị của A khi x=-4 c,Tính giá trị của A khi /2x-3/=1 d,Tính giá trị của A khi /x-2/=3x+2 e,Tính giá trị của A khi 2x^2 +3x-2=0 f,Tìm x thuộc Z để A có giá trị nguyên g, Tìm GTLN của biểu thức: P=(3x+3) : A B=(x/x^2-9 + 1/x+3 - 2/x-3) : (1-x/x+3) a,Rút gọn B b,Tính giá trị B khi x=-5 c, Tính giá trị của B khi /3x-2/=7 d,Tính giá trị của B khi /x-5/=2x-2 e,Tính giá trị của B khi 3x^2+8x-3=0 f, Tìm X thuộc Z để B có giá trị nguyên g,Tìm GTNN của biểu thức: Q=(-3x-6) : B VOTE 5 STARRRRRRRRRRRRRRRRRRRRRRRRRRRRRS
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