Calculus & Numerical Methods
Left Riemann Sum
Definite integral via left endpoints.
Formula
Formula
∫ab f dx ≈ h Σ f(left points)
Variables
| Symbol | Definition | Type & range | Units | Role |
|---|---|---|---|---|
| f | integrand | expression / text | x | input |
| a, b | limits | real number (ℝ) | — | input |
| n | intervals | integer (ℤ) | — | input |
Try it yourself
Interactive calculator
Worked examples
Example 1
Givenf(x) = x*x, a = 0, b = 1, intervals n = 1000
Result0.3328335
Example 2
Givenf(x) = x, a = 0, b = 2, intervals n = 1000
Result1.998