f ((x) = ln ((x) qismlarga integratsiyalash uchun quyidagi formuladan foydalanib integratsiyalash mumkin: ∫udv = uv - ∫vdu Bu holda, u ln ((x) bo'lsin va v x bo'lsin. Bu du (1/x) dx, dv esa dx bo'lishini anglatadi. Shunday qilib, ∫ln ((x) dx = ln ((x) * x - ∫(x/x) dx, yoki x*ln ((x) - x + C
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