How To: Use the Gauss Method to find triangular numbers

Use the Gauss Method to find triangular numbers

The first video is an elementary explanation of triangular numbers and a Gauss demonstration for the sum of the first 100 natural numbers.

Video two uses the Gauss Method to find the sum 1+2+...+n. See arithmetic progressions and obtaining a general formula for the sum of an arithmetic progression.

The third focuses on recursive relation for triangular numbers. See a solution to the recursive equation and another solution to the recursive equation.

(1) Part 1 of 3 - How to Use the Gauss Method to find triangular numbers, (2) Part 2 of 3 - How to Use the Gauss Method to find triangular numbers, (3) Part 3 of 3 - How to Use the Gauss Method to find triangular numbers

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