Question

R/[3;+infinit)












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Answer 1

Răspuns:

( - infinit, 3)

R se considera ca ( -infinit, +infinit)

Answer 2

Explicație pas cu pas:

$\Big(-\infty ;3 \Big) \cup \Big[3 ; +\infty \Big) = \mathbb{R}$

$\implies \mathbb{R} {/} \Big[3 ; +\infty \Big) = \Big(-\infty ;3 \Big)$