Matrices

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matrix

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a rectangular arrangement of numbers

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dimensions of a matrix

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m rows and n columns; m × n (read "m by n")

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8 Terms

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matrix

a rectangular arrangement of numbers

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dimensions of a matrix

m rows and n columns; m × n (read "m by n")

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elements

the numbers in a matrix

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scalar

a real number

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scalar multiplication

to multiply a matrix by a scalar, multiply each element in the matrix by the scalar

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Cramer's Rule

using determinants to solve a system of linear equations

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identity matrix

a matrix with ones for all elements on the main diagonal (top left to bottom right) and zeros for all the other elements

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inverse matrices

two n x n matrices A and B whose product is the n x n identity matrix; AB = I and BA = I