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  1. Left & right Riemann sums (article) | Khan Academy

    One possible choice is to make our rectangles touch the curve with their top-left corners. This is called a left Riemann sum. Another choice is to make our rectangles touch the curve with their …

  2. Over- and under-estimation of Riemann sums - Khan Academy

    The average of the left hand rectangle approximations and right hand rectangle approximations is called the trapezoidal approximation. This is because when you average the left and right …

  3. Riemann sums review (article) | Khan Academy

    When you take right Riemann sums, you exclude the first data point and when you take left Riemann sums, you exclude the last one. Frankly speaking, you don't need to memorize this.

  4. Riemann sums in summation notation (article) | Khan Academy

    When we are writing a right Riemann sum, we will take values of i ‍ from 1 ‍ to n ‍ . However, when we are writing a left Riemann sum, we will take values of i ‍ from 0 ‍ to n − 1 ‍ (these will give us …

  5. Riemann approximation introduction (video) | Khan Academy

    It's an underestimate, but it's an approximation of the area under the curve. In the next few videos, we're going to try to generalize this to situations where we have an arbitrary function and we …

  6. Worked example: finding a Riemann sum using a table (video

    When we have a table of values of a function, we can use it to find a Riemann sum approximation of that function.

  7. Left & right Riemann sums (practice) | Khan Academy

    Approximate the area between the x -axis and h (x) from x = 3 to x = 13 using a right Riemann sum with 4 unequal subdivisions. ... The approximate area is units 2 .

  8. Using tables to approximate limit values - Khan Academy

    Tables can be a powerful tool to approximate a limit, but they need to be used wisely. Learn how to create tables in order to find a good approximation of a limit, and learn how to approximate …

  9. Definite integral as the limit of a Riemann sum - Khan Academy

    Definite integrals represent the area under the curve of a function, and Riemann sums help us approximate such areas. The question remains: is there a way to find the exact value of a …

  10. Left & right Riemann sums (practice) | Khan Academy

    Calculus 1 Course: Calculus 1 > Unit 6 Lesson 2: Approximation with Riemann sums Riemann approximation introduction Over- and under-estimation of Riemann sums Left & right Riemann …