الرياضيات مش حفظ.. الرياضيات فهم

a² + b² = c² ◆ sin²θ + cos²θ = 1 ◆ Δ = b² − 4ac ◆ x = (−b ± √Δ) / 2a ◆ d/dx (xⁿ) = n·xⁿ⁻¹ ◆ ∫ xⁿ dx = xⁿ⁺¹⁄(n+1) + C ◆ lim(x→0) sin x / x = 1 ◆ log(ab) = log a + log b ◆ Σ k = n(n+1)/2 ◆ e^(iπ) + 1 = 0 ◆ a² + b² = c² ◆ sin²θ + cos²θ = 1 ◆ Δ = b² − 4ac ◆ x = (−b ± √Δ) / 2a ◆ d/dx (xⁿ) = n·xⁿ⁻¹ ◆ ∫ xⁿ dx = xⁿ⁺¹⁄(n+1) + C ◆ lim(x→0) sin x / x = 1 ◆ log(ab) = log a + log b ◆ Σ k = n(n+1)/2 ◆ e^(iπ) + 1 = 0 ◆