Section formula in 3D (Derivation) | Vector Algebra | Grade 12 | Math | Khan Academy

In this video, we derive the section formula for vectors for both internal and external division. We leverage the concept of collinearity to find the vector that divides the line segment joining two vectors in a given ratio. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! (https://www.khanacademy.org/math/ncer...) Timestamps: 0:00 Visualising the vectors 2:44 Proving section formula for internal division 4:25 Proving section formula for external division Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Ashish Gupta