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11 giờ trước (22:32)

\(66 > x > 68\)

\(x < 66\)\(x > 68\)

\(\rarr\) không có số tự nhiên nào vừa nhỏ hơn \(66\) vừa lớn hơn \(68\)

Vậy không có giá trị nào của \(x\)

11 giờ trước (22:44)

A \(= (1/(x-√x) + 1/(√x-1)) : ((√x+1)/(x-2√x+1))\)

\(= (1/(√x(√x-1)) + 1/(√x-1)) × ((√x-1)²/(√x+1))\)

\(=(\frac{(1+\sqrt{x})}{(\sqrt{x}(\sqrt{x}-1))})\times\left(\frac{(\sqrt{x}-1)^2}{(\sqrt{x}+1)}\right)\)

\(=\frac{(\sqrt{x}-1)8}{\sqrt{x}}\)

Điều kiện: \(x > 0, x ≠ 1\)

A \(=\frac{(\sqrt{x}-1)}{\sqrt{x}}\)

9 giờ trước (0:46)

Ta có: \(A=\left(\frac{1}{x-\sqrt{x}}+\frac{1}{\sqrt{x}-1}\right):\frac{\sqrt{x}+1}{x-2\sqrt{x}+1}\)

\(=\frac{\sqrt{x}+1}{\sqrt{x}\left(\sqrt{x}-1\right)}\cdot\frac{\left(\sqrt{x}-1\right)^2}{\sqrt{x}+1}=\frac{\sqrt{x}-1}{\sqrt{x}}\)

12 giờ trước (21:51)

yas

12 giờ trước (21:52)

đánh trống nổ hết tai ng xem:))

12 giờ trước (21:43)
=310471
12 giờ trước (21:44)

34446.9+457

=310014+457

=310471

12 giờ trước (21:38)

\(3343 + 345 × 8 : 2 - 3 + 54 × 4\)

\(= 3343 + 2760 : 2 - 3 + 216\)

\(= 3343 + 1380 - 3 + 216\)

\(= 4723 - 3 + 216\)

\(= 4720 + 216\)

\(= 4936\)

12 giờ trước (21:34)

569


1 giờ trước (8:10)

345 + 56 x 4

= 345 + 224

= 569

There are many types of energy sources. In a world where the instability of both society and nature is increasing, the issue of energy is a hot issue of great concern. Fossil energy sources, which have been considered as the main source of energy, are gradually becoming scarce and are also the cause of many immobility and disputes between countries around the world. The following energy sources are available: Nuclear Energy, Compressed Natural Gas; Biomass energy; Geothermal energy. Meanwhile,...
Đọc tiếp

There are many types of energy sources. In a world where the instability of both society and nature is increasing, the issue of energy is a hot issue of great concern. Fossil energy sources, which have been considered as the main source of energy, are gradually becoming scarce and are also the cause of many immobility and disputes between countries around the world. The following energy sources are available: Nuclear Energy, Compressed Natural Gas; Biomass energy; Geothermal energy. Meanwhile, as scientists predict, with the current rate of exploitation and use of fossil resources, within a few centuries our descendants will have to bear serious consequences. Since then, the need for alternative energy sources has become more and more urgent, and more and more alternative energy research projects have been started and developed. However, not 100% of them are suitable for future development.

1
2 giờ trước (7:16)

um

13 giờ trước (20:55)

🐭cheat cheat : cheese 🧀