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Regla de Sarrus

Regla de Sarrus. para matrices 2x2. Karla Paulina Ibarra Glez 1 de agosto 2009. Determinante. Es una función que asocia una matriz cuadrada A de orden n a un escalar que se denota por : |A| ó det A. Regla de Sarrus para matrices de orden 2x2.

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Regla de Sarrus

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  1. Regla de Sarrus para matrices 2x2 Karla Paulina Ibarra Glez 1 de agosto 2009

  2. Determinante • Es unafunciónqueasociaunamatrizcuadrada A de ordenn a un escalarque se denotapor: |A| ó det A

  3. Regla de Sarrus para matrices de orden 2x2 • Al producto de la diagonal principal se le resta el producto de la diagonal suplementaria (inversa, invertidaosecundaria) y el resultadoes un escalar

  4. Ejemplos: Calcule el determinantepor el método de Sarrus

  5. |A|= (4)(-3) - (-2)(3) = -6 -12 - (-6) = Diagonal principal Diagonal Suplementaria A=

  6. (1/2)(4) - (6)(7) = -40 2 - (42) = |A|= A=

  7. 14 |A|= (-4)(-5) - (-2)(-3) = 20 - (6) = A=

  8. 10 -10 - (-20) = |A|= (-5)(2) - (-2)(10) = A=

  9. 7 |A|= -5 - (-12) = A=

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