∫₀² x² dx = [x³/3]₀² = 8/3 − 0 = 8/3 ≈ 2.667. The antiderivative F(x) = x³/3 gives the exact area without approximation.
A Riemann sum with 8 rectangles gives ≈ 0.273. The exact answer is 8/3 ≈ 2.667. The Fundamental Theorem gives exact results with no rectangles needed.
Memorize pi, e, and 40+ mathematical constants using the numpad path method
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