Khan-Linear Algebra

lecture link

Vector has both magnitude and direction.Speed is not a vector. This is considered to be a scalar quantity. If we want it to be a vector, we would also

Linear combination: an expression constructed from a set of terms by multiplying each term by a constant and adding the results.Let's see some example

Linear dependence, independence

introduces three conditions to be a subspace

Vector dot product and vector length // proving vector dot product properties //