# Browse Classroom Capsules and Notes

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Displaying 1081 - 1090 of 1209

The number of distinct bridge auctions is calculated.
A weighted arithmetic/geometric mean inequality is proved.

Elementary examples from college algebra illustrate the idea of involutions.

Elementary examples, specifically Pythagorean triangles, illustrate the idea of involutions.
A new way to derive infinite series expressions for $$\ln 2$$ and $$\ln 3$$

The author illustrates how certain determinants can be used to motivate students. The determinants in question have terms in artithmetic progressions.

This author discusses the efficiency of computing integrals on a calculator using Taylor series.

The author describes a convenient method for calculating determinants where all entries on a given diagonal are equal and for some more general situations.

A proof without words approach to the geometric-arithmetic mean inequality

The author uses Minkowski sums to estimate the length of the perimeter of an ellipse.