Предмет: Алгебра, автор: alinawsabitova

log3(x-3)+log3 x=log3 4

Ответы

Автор ответа: MizoriesKun
0
Log3(x-3)+log3 x=log3 4       ОДЗ х-3>0  x>3
Log3(x-3)*x=log3 4
(x-3)*x= 4
х²-3х-4=0
D=9+16=25
x=(3+5)/2=4
x=(3-5)/2=-1  не подходит под ОДЗ
Ответ :х=4
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Английский язык, автор: dosanbi
2 Present perfect/Past perfect 9.6.71) Read the theory. Then, use the phrases in the brackets to make sentences. • We use the present perfect (have + past participle of the main verb) for: a) actions which happened at an unstated time in the past and continue up to the present. Kanat has lost his gloves for skiing, b) experiences. I've tried surting, but I haven't tried canoeing vet. We use the past perfect (had + past participle of the main verb) for: a) actions that happened before another action in the past. He had bought a guitar a month before he started the lessons. b) actions that finished in the past and whose result was visible in the past. She was happy. She had started a new hobby. (The result was visible in the past.) Compare: She is happy. She has started a new hobby. (The result is in the present.) Note: The past perfect is the past equivalent of the present perfect 1 He is sad. (lose his rugby ball) He has lost his rugby ball. 2 She was excited. (buy a new camera). 3 They were happy. (win first prize) 4 We are worried. (not hear from Bob yet) ​
5 лет назад
Предмет: Математика, автор: vrednaya21
Хелп((((((((((((((((((((((((((​
5 лет назад
Предмет: Математика, автор: rdn2004
1) Точка K принадлежит к отрезку AB. Зная, что AB : KB = 5 : 3, найдите отношения AK : AB.

A————K————————B

2) Точка M делит отрезок EF на две части, отношение которых EM : MF = 2 : 5. Найдите отношение EF : MF.

E———M—————————F
5 лет назад
Предмет: Математика, автор: шамиль090
вставь вместо геометрических фигур числа 3, 5, 7 так, чтобы слева получились равенства. Выбери правильный вариант ответа.
9 лет назад
Предмет: Математика, автор: wowangrigoriev2
помогите решить /5 -8x/=35
9 лет назад