Matrices
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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
Flashcards (37)