Предмет: Алгебра, автор: masha1950

Помогите пожалуйста решить....!!!!
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1)Log₃(3x+2)=log₃(x+4)=
2)lg(x²-2x-4)=lg11


masha1950: пжжж

Ответы

Автор ответа: darpankratova08
0

Ответ:

логарифмы можно сократить. далее решаем как обычные уравнения. т. е. 3x+2=x+4; x^2-2x-4=11. думаю, с обычными уравнениями можно справиться

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I, II, III Conditionals

Task 1. Complete the sentences with the correct forms of the verbs in brackets.

a) If she (not, be) ______________________in a hurry, she would have never lost those documents.
b) If I (be) ______________________you, I wouldn’t spend all my pocket money on cosmetics.
c) You won’t go out if you (not, tidy) ______________________ your room.
d) If he had been more careful, he (not, lose) ______________________his driving licence.
e) If I had a car, I (go) ______________________on a long journey.
f) They (not come) ______________________to you tomorrow if you don’t apologise to them for being so rude.

Task 2. Complete the sentences with the correct forms of the verbs in brackets.

a) If I (be) ______________________ rich, I (buy) ______________________ a big house.
b) She (see) ______________________ her dentist tomorrow if she (has) ______________________ time.
c) If they (work) ______________________hard last week, they (earn) ______________________a lot of money, but they didn’t.
d) If I (be) ______________________you, I (tell) ______________________him the truth.
e) I (not be) ______________________late for work last week if I (wake up) ______________________earlier.
f) She (help) ______________________you with your housework tomorrow if you (ask) ______________________her.

Mixed Conditionals (II + III, III + II)

Task 3. Complete the sentences with the correct forms of the verbs in brackets.

a) If I (be) ______________________intelligent, he (pass) ______________________his exams very well last month.
b) If she (marry) ______________________him 10 years ago, she (be) ______________________ rich now.
c) She (not, feel) ______________________offended by his joke yesterday if she (have) ______________________a sense of humour.
d) I he (not, spend) ______________________all his money last week, he
(be able) ______________________to but this jacket now.