Home
О нас
Products
Services
Регистрация
Войти
Поиск
kotenokmacho
@kotenokmacho
November 2021
1
5
Report
49×-6*7×+5>0
помогите пожалуйста
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
ShirokovP
Verified answer
49^x - 6*7^x + 5 > 0
Пусть 7^x = t, тогда
t^2 - 6t + 5 > 0
t^2 - 6t + 5 = 0
D = 36 - 20 = 16
t1 = ( 6 + 4)/2 = 10/2 = 5
t2 = (6 - 4)/2 = 2/2 = 1
Обратная замена
7^x = 5
x = log 7 (5)
7^x = 1
x = 0
+ - +
----------------- 0 ----------------- log 7 (5) ------------> x
x ∈ ( - ∞; 0 ) ∪ (log 7 (5) ; + ∞)
2 votes
Thanks 1
More Questions From This User
See All
kotenokmacho
August 2022 | 0 Ответы
144 log 9 24log 32log log2 log14 46loglog pomogite
Answer
kotenokmacho
August 2022 | 0 Ответы
4 3i 43i pomogite pozhalujsta
Answer
kotenokmacho
July 2022 | 0 Ответы
najdite naibolshee znachenie funkcii fx x 2x3 na otrezke 43
Answer
kotenokmacho
July 2022 | 0 Ответы
najdite promezhutki vozrastaniya i ubyvaniya funkcii y x3h2 pozhalujsta pomogite
Answer
kotenokmacho
July 2022 | 0 Ответы
5...
Answer
kotenokmacho
July 2022 | 0 Ответы
log3x 6logx 6 pomogite pozhalujsta
Answer
kotenokmacho
July 2022 | 0 Ответы
log po osnovaniyu 5 h 11h43 menshe ili ravno 2pomogite pozhalujsta
Answer
kotenokmacho
July 2022 | 0 Ответы
9 v stepeni h1 3 v stepeni h218pomogite pozhalujsta
Answer
kotenokmacho
July 2022 | 0 Ответы
pomogite pozhalujstad2ae1c5c1cf19f447a6aef18f7c5d3dd 55686
Answer
kotenokmacho
July 2022 | 0 Ответы
h32 pomogite pozhalujsta
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 "49×-6*7×+5>0помогите пожалуйста..."
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
49^x - 6*7^x + 5 > 0Пусть 7^x = t, тогда
t^2 - 6t + 5 > 0
t^2 - 6t + 5 = 0
D = 36 - 20 = 16
t1 = ( 6 + 4)/2 = 10/2 = 5
t2 = (6 - 4)/2 = 2/2 = 1
Обратная замена
7^x = 5
x = log 7 (5)
7^x = 1
x = 0
+ - +
----------------- 0 ----------------- log 7 (5) ------------> x
x ∈ ( - ∞; 0 ) ∪ (log 7 (5) ; + ∞)