Add it all together. Pupils learn how Gauss was able to add the numbers from 1 to 100 so quickly and arrive at a formula to find the sum of a given number of terms of an arithmetic series. Scholars learn the formula to find the sum for a...

Video solving problems 70 to 75 of the Californa Standards Algebra II Test. Concepts covered include arithmetic sequences and series, writing the expression for a composition of functions and evaluating the composition of functions,...

Triangular numbers are introduced in this video which shows how triangular numbers are found and then proceeds to explain Gauss' method for adding arithmetic sequences.

Continuing the podcast from Triangular Numbers (Part I), the Gaussian formula for summing numbers of an arithmetic sequence is derived with good explanation, and then used for a couple examples.

Continuing from Triangular Numbers (Part II), the podcast solves Gauss' formula for the sum of an arithmetic sequence. Recursive equations are explained heavily, and used in order to solve the Gauss formula.

This video lesson discuss the sum of a sequence.

An introductory video on sequences and series. Provides examples of both arithmetic and geometric series, but does not give formal definitions. Introduces and uses sigma notation for sums of series. Illustrates how the general form for a...

An introductory video on sequences and series. Provides examples of both arithmetic and geometric series.

This video shows how to derive a general formula for an arithmetic series.

Video tutorial uses examples to reinforce understanding of how to find the sum of the numbers from 1 to 100. [2:48]

Video explores triangular numbers and equivalent representations for numbers in the context of the song "The Twelve Days of Christmas." [10:17]