brilliant as always Stuart, keep making videos mate you are making a real difference.
MrEmbouy
Good point. We should have a universal symbol. All the best for those end of year exams.
ExamSolutions_Maths
No. You can only find inverses for square matrices. This is the method for 2x2 matrices.
ExamSolutions_Maths
It is interesting to note that round brackets have been used for the matrices. In Australia, at least, we use square brackets because if students don't put enough of a curve in the brackets, it could be mistaken for the determinate of the matrix where we use straight lines. It is good revision as I have end of year exams coming up soon, and I really like the neatness of the writing and setout.
JLawrence
thank you for your tutorials, they are ever-living!
Please, do some more on Norms..
sokhibtukhtaev
Thank you so much for these videos. They are so helpful! I'm also revising for end of year exams and this is perfect for clarifying ideas. Thanks again!
cassandrahamill
Awesome video; thank you very much :-)
flyeraerospace
How come elements c and d don't switch places?
alexanderalden-fenn
how different is a 3x3 matrix inverse ?
DwNzBladeZ
Hello, Do you have a video on 3x3 matrix with inverse?
jeriwolfcr
Casio fx-991ES saves so much reviewing time... I got it just in time.
persiangulfcat
Matrices are the cornerstone of linear algebra so they're heavily used in Machine Learning algorithms :)
ozzyfromspace
Thinking about the identity matrix geometrically, Matrix A multiplied by Matrix I means to transform I by A. This 'transformation' gives back A because I's columns contain [1 0] for i-hat and [0 1] for j-hat, which are the very same basis vectors used to describe the transformation of Matrix A itself. So scaling I's basis vectors by A's transformation (or by any vector/matrix) leaves A unmoved. It's akin to doing 0+m=m.
