3 задания. Алгебра. 8 Класс, во вложении. Created by lalkalolol. algebra-ru

3 задания. Алгебра. 8 Класс, во вложении...

lalkalolol @lalkalolol

October 2021 1 22 Report

3 задания. Алгебра. 8 Класс, во вложении

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$1)\; \; f(x)=\frac{1}{4}x^2\; \; ,\; \; g(x)=\frac{1}{3}x^2\\\\f(-2)=\frac{1}{4}\cdot (-2)^2=\frac{1}{4}\cdot 4=1\\\\g(12)=\frac{1}{3}\cdot 12^2=\frac{144}{3}=48\\\\\frac{f(-2)}{g(12)}=\frac{1}{48}\approx 0,021$

$2)\; \; y=ax^2$

Парабола проходит через точку (2,-1). Подставим х=2 и у= -1 в уравнение параболы:

$-1=a\cdot 2^2\; \; \Rightarrow \; \; a=-\frac{1}{4}$

$3)\; \; f(x)=-5x^2\\\\f(6x^3)=-5\cdot (6x^3)^2=-5\cdot 36x^6=-180x^6$

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