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(-2)la puterea a 2[1-2(x+5)]>= x , unde x e Z


Răspuns :

(-2)²[1-2(x+5)]≥x
4(1-2x-10)≥x
4-8x-40≥x
-36≥x+8x
-36≥9x
9x≤-36
x≤-36:9
x≤-4
x∈{-∞,-4}