НEEELP Помогите решить, ПОЖАЛУЙСТА. Created by nikolay231122. matematika-ru

1. x² - 6x + 8 ≥ 0D = 36 + 64 = 100x1 = (6-10)/2 = -2x2 = (6 + 10)/2 = 8Ответ: x ∈ (-∞; -2) U (8; +∞)2. (4-x²) / (x-1) > 0__+__(-2)__-___(1)___+____(2)_-_Ответ: x ∈ (-∞; -2) U (1; 2)3. {25 - x² ≥ 0 {x+3 > 0{x + 3 ≠1__(-5)_____(-3)/_/_/_/_/_/(-2)/_/_/_/_/_/_/(5)__Ответ: x ∈ (-3; -2) U (-2; 5)4.{-x² - x + 2 ≥ 0{sinx > 0 => x ∈ U(k ∈ Z) (2πk, π + 2πk)D = 1 + 8 = 9x1 = (1 - 3)/(-2) = 1x2 = (1 + 3)/(-2) = -2x ∈ (-2; 1)sin x > 0 => x ∈ (0; 1)Ответ: x ∈ (0; 1) Спасибо Реклама Реклама Новые вопросы в Математика сколько будет 90+100 когда началась ВОВ? 1)19452)19403)19804)1950 Решите систематично уравнения способом подстановки В треугольнике АВС бесектриса СК и АМ , ВМ : ВС =1:2,угол 1 =25° ,угол 2=х° Найдите х Упростите вычислите выражения представьте в виде натурального числа А) 0,5(в -7 степени)×0,5(в 6степени) Б)(10(в -3 степени))(в -1 степени) При подготовке к контрольной работе в первый день Оля решила 40 % всех предложенных задач, а остальные задачи решала поровну в каждый из двух оставших … ся дней. Сколько всего было рекомендовано задач, если в первый день Оля решила на 4 задачи больше, чем в третий? Помогите пожалуйста решить задачу Найдите значение выражения а) 1/2 +5/8 За 8 суток часы ушли вперед на 6 минут. На сколько минут с они уходят вперед за сутки? Найдите значение выражения 11/15-2/5 Найдите значение выражения 11/15-2/5 Предыдущий Следующий Реклама - это не так уж плохо Реклама - это не так уж плохо Понимаем - вы пришли сюда не за рекламой. Но она помогает нам предоставлять бесплатный доступ к Знаниям. Пожалуйста, внесите наш сайт в список разрешенных. ОК, разблокирую рекламу на Знаниях! Вместе мы знаем больше Этот сайт использует cookies Политика Cookies . Вы можете указать условия хранения и доступ к cookies в своем браузере. 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НEEELP Помогите решить, ПОЖАЛУЙСТА...

nikolay231122 @nikolay231122

August 2021 1 6 Report

НEEELP
Помогите решить, ПОЖАЛУЙСТА

Answers & Comments

IrkaShevko

Verified answer

1. x² - 6x + 8 ≥ 0
D = 36 + 64 = 100
x1 = (6-10)/2 = -2
x2 = (6 + 10)/2 = 8

Ответ: x ∈ (-∞; -2) U (8; +∞)

2. (4-x²) / (x-1) > 0
__+__(-2)__-___(1)___+____(2)_-_

Ответ: x ∈ (-∞; -2) U (1; 2)

3.
{25 - x² ≥ 0
{x+3 > 0
{x + 3 ≠1
__(-5)_____(-3)/_/_/_/_/_/(-2)/_/_/_/_/_/_/(5)__

Ответ: x ∈ (-3; -2) U (-2; 5)

4.
{-x² - x + 2 ≥ 0
{sinx > 0 => x ∈ U(k ∈ Z) (2πk, π + 2πk)
D = 1 + 8 = 9
x1 = (1 - 3)/(-2) = 1
x2 = (1 + 3)/(-2) = -2
x ∈ (-2; 1)

sin x > 0 => x ∈ (0; 1)

Ответ: x ∈ (0; 1)