Vamos analisar as opções: A. 0 < x < d: ; d < x < 4d/7: ; 4d/7 < x < 2d: ; 2d < x < 3d: B. 0 < x < d: ; d < x < 2d: ; 2d < x < 7d/3: ; 7d/3 < x < 3d: C. 0 < x < d: ; d < x < 3d/4: ; 3d/4 < x < 2d: ; 2d < x < 3d: D. 0 < x < d: ; d < x < 4d/7: ; 4d/7 < x < 2d: ; 2d < x < 3d: E. 0 < x < d: ; d < x < 7d/4: ; 7d/4 < x < 2d: ; 2d < x < 3d: Analisando as opções, a alternativa correta é a letra C: 0 < x < d: ; d < x < 3d/4: ; 3d/4 < x < 2d: ; 2d < x < 3d:
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