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Sagot :

Réponse :

[tex]e^{3x - 9}[/tex] ≤ [tex]e^{-27}[/tex]

3x - 9 ≤ -27

3x - 9 + 27 ≤ 0

3x + 18 ≤ 0

3(x + 6) ≤ 0

x + 6 ≤ 0

x ≤ -6

S = {-∞ ; -6}

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