Kết quả tìm kiếm

  1. Yuriko Narumi

    English THCS Complete each sentence with two to five words, including the word in bold

    1. the wall that is surrounding the castle 2. a small village which is located at the foot of 3. people who are standing in the queue 4. jewelry that is displayed in the exhibition 5. CD player that my parents gave to me
  2. Yuriko Narumi

    English THCS Chọn đáp án đúng

    21C. The villagers 22B. strange 23D. look after 24D. they live directly on the water
  3. Yuriko Narumi

    Toán 8 Giải phương trình nghiệm nguyên

    Ta có: 2x^2+3x+2=2(x^2+3/2x+1)=2(x+3/4)^2+7/8>0 ⇔2x^2+3x+2>0 ⇔x^3+2x^2+3x+2>x^3 ⇔y^3>x^3 ⇔y>x(1) Chứng minh y<x+2 ⇔y^3<x^3+6x^2+12x+8 ⇔x^3+2x^2+3x+2<x^3+6x^2+12x+8 ⇔4x^2+9x+6>0 ⇔(2x+9/4)^2+15/8>0(lđ) ⇔x+2<y(2) Từ (1) và (2) suy ra y=x+1 ⇔y^3=x^3+3x^2+3x+1...
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