Một số cách tiếp cận bài toán cực trị trong không gian

Abstract

In this article, we present some ways to find the shortest path from a point A to a point B in a 3-dimensional Euclidean space by using three approaches:

• Transform the problem in a 3-dimensional Euclidean space into a problem ina 2-dimensional Euclidean space.
• By using vector inequality.
• By using applications of derivative.