РЕШИТЕ ДАЮ 15 БАЛЛОВ Функция задана формулой: y=3x^2 - 10x

August 2022 2 0 Report

РЕШИТЕ ДАЮ 15 БАЛЛОВ

Функция задана формулой: y=3x^2 - 10x - 8
1)Найти y(1), y(-1), y(0)
2)Найти значение x, при которых y(x) = -16

dan4ik023 Y = 3x² - 10x - 8
1) y(1) = 3 * 1² - 10 * 1 - 8 = 3 - 10 - 8 = - 15
y(- 1) = 3 * (- 1)² - 10 * (- 1) - 8 = 3 + 10 - 8 = 5
y (0) = 3 * 0² - 10 * 0 - 8 = - 8
2) y(x) = - 16
- 16 = 3x² - 10x - 8
3x² - 10x + 8 = 0
D = (-10)² - 4 * 3 * 8 = 100 - 96 = 4
$X _{1} = \frac{10+ \sqrt{4} }{6} = \frac{10+2}{6} = \frac{12}{6}= 2$
$X _{2}= \frac{10- \sqrt{4} }{6} = \frac{10-2}{6} = \frac{8}{6} = \frac{4}{3} = 1 \frac{1}{3}$

1 votes Thanks 3

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Verified answer

Y(1)=3*1^2-10*1-8=-15
y(-1)=3*(-1)^2-10*(-1)-8=3+10-8=5
y(0)=3*0^2-10*0-8=-8
2) x1=2; x2=4/3

7 votes Thanks 16

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