A-Level Further Maths F6-13 Vector Product: Find the Equation of the Plane containing Three Points

[grrrnom.com]

thank you so much Mr TLMATHS. its the night before my as levels and I finally feel confident.

[FarmYardGaming]

I've struggled with this since we first covered it, this is several times easier for me. Thanks.

[onlyh]

sir would i be allowed to use this as i do edexcel fm would i be penalised for using this as its not in my specification

[cheesecake]

Hi! A question was asking to find the equation of a plane after it had been transformed by a matrix. It was originally in the form r = ... + λ(...) + µ(...). My first thought was to find the normal by doing (λ x µ) and then apply the matrix to the normal to find the transformed normal, however I got the wrong answer doing that and the book transforms the two direction vectors first and then finds the normal from those. I am not sure why it has to be done this way? Thanks and also love the videos