Home
О нас
Products
Services
Регистрация
Войти
Поиск
1357246078
@1357246078
August 2022
1
9
Report
3*4^x +2*9^x-5*6^x<0
Please enter comments
Please enter your name.
Please enter the correct email address.
Agree to
terms of service
You must agree before submitting.
Send
Answers & Comments
uekmyfhfp
Verified answer
Все слагаемые разделим на 6^x > 0;
3* 4^x / 6^x + 2*9^x / 6^x - 5* 6^x / 6^x < 0;
3 * (4/6)^x + 2* (9/6)^x - 5 *1 < 0;
3*(2/3)^x + 2 * (3/2)^x - 5 < 0;
(2/3)^x = t > 0; (3/2)^t = 1 / t ;
3 * t + 2 / t - 5 < 0; * t ≠ 0;
(3t^2 + 2 - 5t) / t < 0;
(3t^2 - 5 t + 2) / t < 0;
t > 0; ⇒ 3 t^2 - 5t + 2 < 0
t1 = 1; t 2 = 2/3;
3(t - 1)*(t - 2/3) <0;
используем метод интервалов
+ - +
(0)------(2/3)-------(1)---------- t
при t > 0; ⇒ t ∈ (2/3; 1);
составим двойное неравенство :
2/3 < (2/3)^x < 1;
(2/3)^1 < (2/3)^x < (2/3)^0;
2/3 < 1; ⇒ 0 < x < 1.
Ответ : х∈ (0; 1)
15 votes
Thanks 35
More Questions From This User
See All
1357246078
August 2022 | 0 Ответы
otzyv po rasskazu solzhenicyna otrazhenie v vode v poverhnosti bystrogo potoka
Answer
1357246078
July 2022 | 0 Ответы
lgx3 10lgx10 reshit uravnenie
Answer
1357246078
July 2022 | 0 Ответы
logx32logx2 reshit uravnenie
Answer
1357246078
July 2022 | 0 Ответы
verny li sleduyushie suzhdeniya o formah chuvstvennogo poznaniya a formami chuvstve
Answer
1357246078
June 2022 | 0 Ответы
tex]=4X+8...
Answer
1357246078
November 2021 | 0 Ответы
...
Answer
1357246078
October 2021 | 0 Ответы
34 v stepeni h 29 v stepeni h 56 v stepeni h menshe 0
Answer
1357246078
September 2021 | 0 Ответы
kakoe iz privedyonnyh nizhe slov sochetanij slov dolzhno stoyat na meste propusk
Answer
1357246078
April 2021 | 0 Ответы
(3+5sinX)...
Answer
рекомендуемые вопросы
rarrrrrrrr
August 2022 | 0 Ответы
o chem dolzhny pozabotitsya v pervuyu ochered vzroslye pri organizacionnom vyvoze n
danilarsentev
August 2022 | 0 Ответы
est dva stanka na kotoryh vypuskayut odinakovye zapchasti odin proizvodit a zapcha
myachina8
August 2022 | 0 Ответы
najti po grafiku otnoshenie v3v1 v otvetah napisano 9 no nuzhno reshenie
ydpmn7cn6w
August 2022 | 0 Ответы
Choose the correct preposition: 1.I am fond (out,of,from) literature. 2.where ar...
millermilena658
August 2022 | 0 Ответы
opredelite kak sozdavalas i kto sozdaval arabskoe gosudarstvo v kracii
MrZooM222
August 2022 | 0 Ответы
ch ajtmanov v rasskaze krasnoe yabloko ispolzuet metod rasskaz v rasskaze opi
timobila47
August 2022 | 0 Ответы
kakovo bylo naznachenie kazhdoj iz chastej vizantijskogo hrama pomogite pozhalujsta
ivanyyaremkiv
August 2022 | 0 Ответы
moment. 6....
pozhalujsta8b98a56c0152a07b8f4cbcd89aa2f01e 97513
sarvinozwakirjanova
August 2022 | 0 Ответы
pomogite pozhalusto pzha519d7eb8246a08ab0df06cc59e9dedb 6631
×
Report "3*4^x +2*9^x-5*6^x<0..."
Your name
Email
Reason
-Select Reason-
Pornographic
Defamatory
Illegal/Unlawful
Spam
Other Terms Of Service Violation
File a copyright complaint
Description
Helpful Links
О нас
Политика конфиденциальности
Правила и условия
Copyright
Контакты
Helpful Social
Get monthly updates
Submit
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Verified answer
Все слагаемые разделим на 6^x > 0;3* 4^x / 6^x + 2*9^x / 6^x - 5* 6^x / 6^x < 0;
3 * (4/6)^x + 2* (9/6)^x - 5 *1 < 0;
3*(2/3)^x + 2 * (3/2)^x - 5 < 0;
(2/3)^x = t > 0; (3/2)^t = 1 / t ;
3 * t + 2 / t - 5 < 0; * t ≠ 0;
(3t^2 + 2 - 5t) / t < 0;
(3t^2 - 5 t + 2) / t < 0;
t > 0; ⇒ 3 t^2 - 5t + 2 < 0
t1 = 1; t 2 = 2/3;
3(t - 1)*(t - 2/3) <0;
используем метод интервалов
+ - +
(0)------(2/3)-------(1)---------- t
при t > 0; ⇒ t ∈ (2/3; 1);
составим двойное неравенство :
2/3 < (2/3)^x < 1;
(2/3)^1 < (2/3)^x < (2/3)^0;
2/3 < 1; ⇒ 0 < x < 1.
Ответ : х∈ (0; 1)