MATH 1107 Lecture Notes - Constant Term, N30 Road (Ireland)
Document Summary
In math, a vector is a tool that we use to store data: In physics, a vector stores a magnitude and direction: In math, we use vector notation simply to store quantities that fit well together: A matrix is also a storing device, but it has multiple columns. In this case, each row represents one type of data, and each column represents another type of data. Ex: if we have a linear system: x. We could use the following matrix to represent the data: We say a matrix is c by r (written c x r) when it has c columns and r rows. If a is a matrix, then we use the following notation to tell us entries in the matrix: Ar,c represents the entry in the matrix that is in the r-th row and c-th column. Given the following matrix, give the system of linear equations that it will.
