Ответы на вопрос:
2(lq2 - 1)+lq(5^x +1) ≤lq (5^(1-√x) +5 ) ; 2*(lq2 -lq10)+lq(5^x +1) ≤lq (5^(1-√x) +5 ) ; 2*(lq2/10)+lq(5^x +1) ≤lq (5^(1-√x) +5 ) ; lq5^(-2)+lq(5^x +1) ≤ lq (5^(1-√x) +5 ) ; lq (5^x +1)/25 ≤ lq (5^(1-√x) +5 ) ; 0 ≤ (5^x +1)/25 ≤ 5/(5^√x) +5 ; * * * t =5^x * * * * * * (5^x +1)/25 ≥ 0 при всех x . 0 ≤ (t+1)/25 ≤ 5/t +5 ; 0 ≤ t² +t ≤ 125 +125t ; t² -124t -125 ≤ 0 ; (t +1)(t-125) ≤ 0 ; -1 ≤ t ≤ 125 ; -1 ≤ 5^x ≤ 5³; x ∈(-∞ ; 3].
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