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1, Đổi chỗ 3 viên ở 3 đỉnh tam giác: viên dưới cùng lên đỉnh trên cùng, 2 viên ngoài cùng ở 2 bên đảo xuốn đáy
2, 8-6+2=4; 12-5+8=15; 13-10+15=18. x=15
3,
*) \(5^3+5=130;3^3+3=30;2^3+2=10;1^3+1=2\)
*) 2+3=8 hay 2.(2+3)-2=8
4+5=32 hay 4.(4+5)-4=32
5+8=60 hay 5.(5+8)-5=60
6+7=72 hay 6.(6+7)-6=72
7+8= 7.(7+8)-7=98
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cái này ko chỉ có mỗi số 8 đâu chị ey
trời ơi cái này nhìn lé con mắt con bt hông cái này mà đố cô kiểu này thì cô cho ăn dép báo cáo
- Nguyên nhân quan trọng nhất: Áp dụng thành công những thành tựu của cuộc cách mạng khoa học - kĩ thuật hiện đại để nâng cao năng suất lao động, hạ giá thành sản phẩm, điều chỉnh hợp lý cơ cấu sản xuất.
- Vì có thành tựu khoa học kĩ thuật hiện đại thì mới có thể ứng dụng vào trong sản xuất công nghiệp để cho ra đời những máy móc hiện đại tân tiến, từ đó mới có thể nâng cao năng suất lao động, tăng sản lượng hàng hoá và chất lượng sản phẩm; giảm giá thành sản phẩm do chi phí sản xuất thấp làm tăng sức cạnh tranh trên thị trường, điều chỉnh hợp lí cơ cấu sản xuất.
bài toán khó nhất á
chắc làm được ko
1 doanh nghiệp SX biết tổng phí SX x đơn vị là C(x)=2x³-3x²+400x+5000 nghìn đồng. tổng số tiền thu được khi bán x đơn vị là R(x)=4000x-33x² nghìn đồng. sản lượng tối ưu và doanh thu lúc đó tương ứng là?
1 + 1 = ?
1+1=
Giải theo kiến thức lớp 12 nâng cao