Ответ:Объяснение:⇒ ODZ выполняется

3(x^2-2,5x)

flashkasv @flashkasv

July 2022 1 9 Report

log2/3(x^2-2,5x)<-1
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Ответ:

Объяснение:

$\displaystyle\bf\\log_\frac{2}{3} (x^2-2,5x)$ ⇒ ODZ выполняется

$\bf\\2x^2-5x-3>0\\\\D=b^2-4ac=25-4\cdot2\cdot3=49\\\\x_1=(5+7)/4=3\\\\x_2=(5-7)/4=-0,5\\\\znaki:+++(-0,5)---(3)+++>x\\\\Otvet:x\in(-\infty;-0,5)\cup(3;+\infty)$

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