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Polya1424
@Polya1424
July 2022
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Объясните пожалуйста!!
lg (x2-x-20)<lg(4x-2)
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nKrynka
Lg (x^2 - x - 20) < lg(4x - 2)
x^2 - x - 20 < 4x - 2
x^2 - 5x - 18 < 0
D = 25 + 4*1*18 = 25 + 72 = 97
x1 = (5 -
√97)/2
x2 = (5 +
√97)/2
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Answers & Comments
x^2 - x - 20 < 4x - 2
x^2 - 5x - 18 < 0
D = 25 + 4*1*18 = 25 + 72 = 97
x1 = (5 - √97)/2
x2 = (5 + √97)/2