Home
О нас
Products
Services
Регистрация
Войти
Поиск
elizaveta2000ku
@elizaveta2000ku
July 2022
1
8
Report
Помогите, пожалуйста, с примерами:
1) lg (3х2 + 7) - lg (93х – 2) = 1
2) lg(х – 1) + lg(х + 1) = 3 lg 2 + lg(х – 2)
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
sangers1959
Verified answer
1) lg(3x²+7)-lg(93x-2)=1 ОДЗ: 3х₁+7>0 x>-7/3 93x-2>0 x>2/93 ⇒x>2/93≈0,022
lg(3x²+7)/(93x-2)=1
(3x²+7)/(93x-2)=10¹
3x²+7=930x-20
3x²-930x+27=0 D=864576 √D=4√1501
x₁=155+4√1501≈310
x₂=155-4√1501≈=0,03.
2) lg(x-1)+lg(x+1)=3*lg2+lg(x-2) ОДЗ: x-1>0 x+1>0 x-2>0 ⇒ x>2
(x-1)((x+1)=2³*(x-2)
x²-1=8x-16
x²-8x+15=0 D=4 √D=2
x₁=5 x₂=3
2 votes
Thanks 1
More Questions From This User
See All
elizaveta2000ku
August 2022 | 0 Ответы
pomogite pozhalujsta reshit ochen ochen nuzhno zavtra ekzamen
Answer
elizaveta2000ku
July 2022 | 0 Ответы
tex]...
Answer
elizaveta2000ku
July 2022 | 0 Ответы
kostya kupil 2 shokoladki pervaya na60 dorozhechem vtoraya na skolko procentov vt
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 "Помогите, пожалуйста, с примерами: 1) lg (3х2 + 7) - lg (93х – 2) = 1 2) lg(х – ..."
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
1) lg(3x²+7)-lg(93x-2)=1 ОДЗ: 3х₁+7>0 x>-7/3 93x-2>0 x>2/93 ⇒x>2/93≈0,022lg(3x²+7)/(93x-2)=1
(3x²+7)/(93x-2)=10¹
3x²+7=930x-20
3x²-930x+27=0 D=864576 √D=4√1501
x₁=155+4√1501≈310
x₂=155-4√1501≈=0,03.
2) lg(x-1)+lg(x+1)=3*lg2+lg(x-2) ОДЗ: x-1>0 x+1>0 x-2>0 ⇒ x>2
(x-1)((x+1)=2³*(x-2)
x²-1=8x-16
x²-8x+15=0 D=4 √D=2
x₁=5 x₂=3