How to Calculate Riemann Sum
What is Riemann Sum?
A Riemann sum is a finite approximation of a definite integral. It partitions the interval [a, b] into n subintervals and approximates the area under the curve using n rectangles. As n → ∞, the Riemann sum converges to the exact integral. Riemann sums are the conceptual foundation for understanding what integration means geometrically.
Formula
Step-by-Step Guide
- 1Divide [a, b] into n equal subintervals of width Δx = (b−a)/n
- 2Left Riemann: use left endpoint of each subinterval — Σ f(xᵢ) · Δx
- 3Right Riemann: use right endpoint — Σ f(xᵢ₊₁) · Δx
- 4Midpoint Riemann: use midpoint — Σ f((xᵢ+xᵢ₊₁)/2) · Δx
- 5Midpoint rule is generally more accurate than left or right for the same n
Worked Examples
Frequently Asked Questions
What is Riemann Sum Is A Finite Approximation Of A Definite Integral?
A Riemann sum is a finite approximation of a definite integral. It partitions the interval [a, b] into n subintervals and approximates the area under the curve using n rectangles
How accurate is the Riemann Sum Is A Finite Approximation Of A Definite Integral calculator?
The calculator uses the standard published formula for riemann sum is a finite approximation of a definite integral. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.
What units does the Riemann Sum Is A Finite Approximation Of A Definite Integral calculator use?
This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.
What formula does the Riemann Sum Is A Finite Approximation Of A Definite Integral calculator use?
The core formula is: Divide [a, b] into n equal subintervals of width Δx = (b−a)/n. Each step in the calculation is shown so you can verify the result manually.
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