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By: a guest on Aug 30th, 2012  |  syntax: None  |  size: 0.41 KB  |  hits: 14  |  expires: Never
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  1. Para racionar mais rápido acredito que possa ser feito assim:
  2.  
  3. | x | > 2  Que resulta em 2 casos:
  4.  
  5. | x | >= 0 =>  x > 2
  6. | x | < 0  => -x > 2 .(-1) => x < -2
  7.  
  8. V = {x E R / x > 2 ou x < -2}
  9.  
  10.  
  11. ----------------------------------------------------------------------------------------------
  12.  
  13.  
  14. | x | < 2
  15.  
  16. | x | >= 0  => x < 2
  17. | x | < 0   => -x < 2 .(-1) => x > -2
  18.  
  19. V = {x E R / -2 < x < 2}
  20.  
  21.  
  22.  
  23. Correto?
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