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Các ký tự toán học dùng đăng bài

*Khi đăng bài tập các bạn copy các kí tự này để post nhé:λ π ∆ Ω ≠ ≈ ≡ ∞ ø µ ² ³ α β γ δ ε Π φ ω Ф ρ ± ≤ ≥ ∑ ∫ ← → ↔ ↓ ↑ ↨ ÷ ∧ ∨ ∩ ∪ ∀∃∈∉ ƒ

Và các kí tự siêu đặc biệt:

– Chỉ số trên: ⁰ ¹ ² ³ ⁴ ⁵ ⁶ ⁷ ⁸ ⁹ ⁿ

– Chỉ số dưới: ₀ ₁ ₂ ₃ ₄ ₅ ₆ ₇ ₈ ₉

– Phân số: ¼ ½ ¾ ⅓ ⅔ ⅕ ⅖ ⅘ ⅙ ⅚ ⅛ ⅜ ⅝ ⅞

– Căn bậc 2: √- Căn bậc 3: ∛- Căn bậc 4: ∜

– Đánh số cho pt ①②③④⑤⑥

1/ Tổng trở:Z = √[(R + r)² + (Zl – Zc)²]

2/ Công suất:P = U²(R + r)/[(R + r)² + (Zl – Zc)²]

3/ φ = φu – φi:tanφ = (Zl – Zc)/(R + r)

4/ Hệ số công suất:cosφ = (R + r)/√[(R + r)² + (Zl – Zc)²]

Một số ký hiệu khác: ± ∞ ≠ ∆ ∀ ≡ ∂ ∅ ω ⋮ π □ ⇔ µ ∑ ε σ τ…

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