nô nem
Giới thiệu về bản thân
-.-bị thu máy k on nhiều
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2026-06-02 10:06:32
=())tf gia đình
2026-06-02 09:59:52
Đặt \(A = \frac{5}{1 \cdot 2} + \frac{5}{2 \cdot 3} + \frac{5}{3 \cdot 4} + \dots + \frac{5}{2021 \cdot 2022}\) \(A=5\cdot \left(\frac{1}{1\cdot 2}+\frac{1}{2\cdot 3}+\frac{1}{3\cdot 4}+\dots +\frac{1}{2021\cdot 2022}\right)\) \(A=5\cdot \left(1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\dots +\frac{1}{2021}-\frac{1}{2022}\right)\) \(A=5\cdot \left(1-\frac{1}{2022}\right)\) \(A=5\cdot \frac{2021}{2022}=\frac{10105}{2022}\)
2026-06-02 09:57:18
hay nha nhi
2026-06-02 09:56:59
củ khoai =)))
2026-06-02 09:55:59
ok
2026-06-02 09:53:47
- BL :Đổi: \(2 \text{ dm} = 20 \text{ cm}\)
- Chu vi hình chữ nhật là:
\((20+13)\times 2=66\text{\ (cm)}\)
2026-06-02 09:50:28
E F
2026-06-02 09:47:10
no
2026-06-02 09:45:44
- Mitigate Climate Change: Shift to renewable energy and protect ecosystems.
- Avert Nuclear Conflicts: Support diplomacy and non-proliferation treaties.
- Control Pandemics: Enhance global virus surveillance and healthcare systems.
- Govern Advanced AI: Establish strict international safety regulations.
- Deflect Asteroids: Invest in early-warning tracking and space defense systems.
2026-06-02 09:37:56
là cj đang k hiểu cái j đang xãy ra hoặc đang sợ toán