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Examen de matemáticas
Ecuaciones, inecuaciones y sistemas |
Resuelve las siguientes ecuaciones:
4 (x + 3)(2x - 5)x = 0
x + x² - 12 = 0
3x-2 - x = x - 2/5 1/x + x+2/2x-3 = x+1/x
Resuelve las siguientes inecuaciones:
2x - 9 < 5x + 3 4x² - 11x + 6 " 0
Resuelve estos sistemas de ecuaciones:
x² - y = 8 y +1 = xy -x
x - 2y = 1 xy = 6
Halla las dimensiones de un rectángulo de perímetro 30m y diagonal (raíz de 113m).
Resuelve este sistema 3x - 2 < 4
5 - x " 1
solucion:
1)a)x=+/- (raiz de 3) b)x= o ; x= -3 : x= 5/2 c) x =2 ; x = ¾ d) x = 5
2)a)[x/ x> -4] = (-4, +oo] b)[x/ x " 3/4] U [x/ x " 2] = ( -oo , 3/4)U[2,+oo)
3) a) x(1)=3 y= 1 = (3,1) x(2) = 5/2 y= - 7/4 =( - 5/2 , - 7/4)
b) x(1) =2 y=3 = (2,3) x(2) =3 y = 2 = (3,2)
4) Un lado mide 7 m y otro 8 m. 5) [x/ x<2] = ( -oo,2)
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Enviado por: | Virus CH |
Idioma: | castellano |
País: | España |