uz < and u4 at the points P1, P2, P3, and P4, respectively, are given by u2 + u4 + 100+100 4 200 + u3 + u1 + 100 u2 4 200 + 100 + u4 + u2 uz 4 u3 + 100 + 100+u1 4 (a) Show that this system of equations can be written as the matrix equation -4 1 1 (–200) 1 -4 1 u2 -300 1 -4 1 uz -300 1 1 -4, -200, (b) Solve the system in (a) by finding the inverse of the coefficient matrix. u = 200 P2 P3 u = 100 u = 100 P1 P4 4 = 100

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Matrices

‘Matrices’ is the plural form of the word matrix, and it is basically a spreadsheet in the form of a box. In mathematics, various functions can be carried out with matrices. Generally, a matrix comes in the shape of a square or rectangle. The elements are distributed horizontally in the form of rows, and vertically in the form of columns.