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Mat exercicios deteminantes 2 e 3 ordem

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Mat exercicios deteminantes 2 e 3 ordem

  1. 1. 1º) Calcule o valor dos determinantes de 2ª ordem : 5 4 −4 2 −9 −4 6 2 a) = b) = c) = d) 2 = 2 2 −1 3 3 5 1 32º) Resolva as equações abaixo : 3 9 2x x + 1 4 3x − 4 2x − 3 x + 5 =3 b) = 33 c) =2 d) = 20 2 x 3 3 2 5x + 6 3 4EXERCÍCIOS SOBRE DETERMINANTES DE 3ª ORDEM1º) Calcule o valor dos determinantes : 2 3 −4 2 3 −1a) − 2 1 2 = b) 3 − 1 1 = 0 5 6 −1 0 3 1 2 3 0 1 −2c) 4 5 6 = d) 3 − 2 1 = 7 8 9 0 1 0 2 3 −1e) 4 1 2 = RESPOSTAS : a ) 68 b) − 35 c) 0 d ) − 6 e) − 47 −3 2 12º) Resolva as equações : 1 0 −1 2 x x a) x 1 3 =0 b) 1 1 0 = 0 1 x 3 x 0 1 1 1 3 1 x 1 2x 4 c) x x 4 = d) 0 1 x =0 1 x 0 x 2 −1 3 3 2 4 1 2 3 −2 e) 2 4 x = 0 f ) 0 1 x =2 3 1 2 2 x −3 Re spostas : a ) { ,−4} , b) { ,−2} c) {2} d ) {− 4,1} e) { } f ) { ,3} 1 1 1 13º) Calcule o valor de S : 2 −1 1 0 1 4 −1 2 3 S= 1 1 1+ 0 2 5 + 5 0 −2 Re sposta : 40 −2 1 1 0 3 6 1 6 4

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