Smallest Area of a Triangle Formed from the Tangent Line of a Parabola
This problem is an applied optimization problem. The problem is to minimize
the area of the triangle formed by a tangent line to the function y = 1⁄9 x2.
The triangle is defined by the origin, the x-intercept of the tangent line, and the
y-intercept of the tangent line. Only triangles formed in the first quadrant are
A System Design Language Primer
A System Design Language provides a means of communicating a design and an approach to determine the effectiveness of a design before it is built. This design language helps to guide the decomposition of the design by asking the right questions at the right time. The process of deﬁning system requirements, communicating these requirements and their chosen solutions, and determining the effectiveness is explained within this primer.
David S. Cochran
Two Simple Proofs for Cramer's Rule
Cramer's rule is usually explained by cofactor expansion of determinant. This note explains two alternative and simple proofs.
Frank the Bunny
Notes on quadratic functions for Mathematics Standard Level