Предмет: Математика, автор: seyeri79

вопросник из эге: решить уравнение ​

Приложения:

Ответы

Автор ответа: afet74
2

Ответ:

x=5

Пошаговое объяснение:

lgx^4+lg (4x)=2+lgx^3;\;\;\;\;\ x>0\\\\ lgx^4-lgx^3=lg\frac{x^4}{x^3} =lgx \\\\ lgx+lg(4x)=2 \\\\ lg4x^2=2\\\\4x^2=10^2\\\\4x^2=100\\\\x^2=25\\\\x=5 ;\;\;\;\; x\neq -5

Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Русский язык, автор: nargiza04
найдите словосочетание а)белка песенки б)белка поёт в)орешки грызёт г)поёт да грызёт
1 год назад
Предмет: Английский язык, автор: vasenkov01
помогите с тестом,пожалуйста:
1 There are six people coming to dinner tonight, so we’ll need two ....... of bread.
A slices B bars C loaves

2 What ....... of this painting? Do you like it?
A are you thinking B you think
C do you think

3 As George ....... down the street, he met an old friend of his.
A went B was going C had gone

4 Why are your clothes so dirty? ....... in the garden again?
A had you been working
B are you going to work
C have you been working

5 My next-door neighbour’s dog is such a pain in the .......; it barks all day and night!
A neck B nerves C mind

6 Logan ....... the good news by his sister.
A has told B was told C told

7 It’s a pity that Janice doesn’t get ....... with some of her classmates.
A across B along C over
8 The new Chinese restaurant serves the best ....... rice in town.
A poached B fried C roast

9 Olivia isn’t as ....... her older sister.
A sociable than B sociable as
C more sociable as

10 Can you turn down the music, please? I...... to concentrate on something.
A I’m trying B try C have tried

11 Who will be ....... charge of the office while Mr Thomson is away?
A on B at C in

12 The gym where my granddad goes has special classes for ....... citizens.
A infant B senior C toddler

13 John ....... us at our new house yet.
A hasn’t been visiting
B hasn’t visited
C didn’t visit

14 You can’t ....... the sofa by yourself! Let me help you.
A lift B raise C put up

15 You don’t need to ....... on a diet; you look just fine.
A start B go C join

16 Don’t expect an apology from Stephen; he’s too ....... to admit that he was wrong.
A stubborn B unreliable C unsociable

17 By the time we got to the theatre, the
performance ....... .
A had been starting
B had been started
C had started

18 Since you don’t like what they serve at your school canteen, why don’t you take a ....... lunch with you?
A fussy B shaped C packed

19 David’s shoulders have ....... wider. Has he been going to the gym?
A grown B developed C increased

20 Jonathan ....... for two hours without a break, and he was exhausted.
A had been jogging B had jogged
C has been jogging


21 Do you think these curtains will go ....... our carpet?
A with B after C down with
22 The traffic is so terrible! We ....... to work really late.
A are getting B will get
C are going to get
1 год назад
Предмет: Русский язык, автор: nastya212208
[... сущ.]1,( чья ...)2. От первой части идет вопрос какая?
Помогите пожалуйста!!!! Прошу вас 10 баллов!
1 год назад
Предмет: Математика, автор: Аноним
ПОМОГИТЕ ПОЖАЛУЙСТА
7 лет назад
Предмет: Алгебра, автор: danielcoolest
При каких значениях параметра b имеют общий корень уравнения: 7x=7b-5 и 8x=8b+6
7 лет назад