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Mathematics, 12.02.2020 03:15 xojade

O conjunto imagem da função f: R-R onde f(x) = módulo de |x-3| - |x+2| -3 fecha módulo -2 é:

a) [-3,7]

b) [-2,7]

c) [-2,6]

d) [-3,6]

A resposta é letra c, mas como que se faz pra saber o conjunto imagem assim? Entendo que o limite inferior é -2, por ser o único número fora do módulo, mas e quanto ao limite superior, por que não é infinito?

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O conjunto imagem da função f: R-R onde f(x) = módulo de |x-3| - |x+2| -3 fecha módulo -2 é:
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