1) log₀.₂₅ (2x²-7x-6)= -2ОДЗ: 2x²-7x-6>0 2x²-7x-6=0 D=49+48=97 x₁=
7-√97 ≈ -0.71 4 x₂ =
7+√97 ≈ 4.21 4 + - +------------ -0.71 ------------ 4.21 -------------\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\x∈(-∞; -0,71)U(4,21; +∞)log₀.₂₅ (2x²-7x-6)=log₀.25 (0.25)⁻²2x²-7x-6 =0.25⁻²2x²-7x-6=(1/4)⁻²2x²-7x-6=4²2x²-7x-6-16=02x²-7x-22=0D=49-4*2(-22)=49+176=225x₁=
7 -15 = -8/4= -2 4x₂=
7+15 = 22/4 = 5.5 4Ответ: -2; 5,52) log₀.₅ (x-4)<1ОДЗ: х-4>0 x> -4log₀.₅ (x-4) < log₀.5 0.5x-4>0.5x>0.5+4x>4.53) log₂ x +log₄ x + log₁₆ x > 3.5 log₂ x +log₂² x +log₂⁴ x >3.5 log₂ x +log₂ x^(¹/₂) +log₂ x^(¹/₄) > 3.5log₂ (x*x^(¹/₂)*x^(¹/₄)) > log₂ 2^(3.5)log₂ (x^(⁷/₄)) > log₂ 2^(⁷/₂) x^(⁷/₄) > 2^(⁷/₂) (x^(¹/₂))^(⁷/₂) > 2^(⁷/₂) √x >2 x>4