Помогите пожалуйста решить неравенство. Created by fcb03. matematika-ru

3^(2x) - 7*3^x - 18 > 03^x = t, t > 0t^2 - 7t - 18 > 0t^2 - 7t - 18 = 0D = 49 - 4*1*(-18) = 121t1 = (7 + 11)/2 = 9t2 = (7 - 11)/2 = -4/2 = -2{(t-9)*(t+2) > 0{t > 0t > 93^x > 93^x > 3^2x > 2Новые вопросы в Математика(-2+0, 874) *16 помогите пожалуйста Покажите взаимно правильные расположение словКогда цена на шоколад выросла на 10%, затем понизилась еще на 20% тогда последняя цена снова повысилась на 25%, она стала ровна 990тг найдите изначал…ьную ценуПомогите пожалуйста срочно!!Площадь кругов на рисунке 27 и 147 собственно. Найдите расстояние между центрами кругов.(п=3)Помогите решить (расписать все 16 примеров по действиям) очень надо, прошу:(Помогите решить(распилить по действиям в че 16 примеров) очень срочно прошу:((Нужно решить все 6 с раскрытым решением(всё по действиям), мне очень срочно нужно, помогите пожалуйста(ᗒᗣᗕ)՞скільки відсотків від числа 40 становить число 24Пожалуйста решите срочноПредыдущийСледующийВместе мы знаем большеЭтот сайт использует cookies Политика Cookies . 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Помогите пожалуйста решить неравенство...

fcb03 @fcb03

July 2022 1 9 Report

Помогите пожалуйста решить неравенство

Answers & Comments

paradiseva

Verified answer

3^(2x) - 7*3^x - 18 > 0
3^x = t, t > 0
t^2 - 7t - 18 > 0
t^2 - 7t - 18 = 0
D = 49 - 4*1*(-18) = 121
t1 = (7 + 11)/2 = 9
t2 = (7 - 11)/2 = -4/2 = -2
{(t-9)*(t+2) > 0
{t > 0
t > 9
3^x > 9
3^x > 3^2
x > 2