Real Analysis | Riemann Integral - Upper & Lower Darboux Sum | Definition With Examples

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For what purpose this theorem is used, as we use integration for area differentiation for slopes like many

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Agar question me partition diye hue hai, tab hume kewal unhi value ke through infimum aur suprrmum nikal kar Darboux sum nikalna hai ya, agar curve thoda wavy hai to aur bhi interval hume khud se lena hoga solve karte waqt?

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