Предмет: Алгебра, автор: Otvettepj

Помогите решить пожалуйста срочно

Известно что 1<а<2. Оцените значение выражения
Даю 10

Приложения:

Ответы

Автор ответа: polarkat
1

1 &lt; a &lt; 2\Rightarrow 3 &lt; 3a &lt; 6\\

1 &lt; a &lt; 2\Rightarrow-3 &lt; -3a &lt; -6\Rightarrow -6 &lt; -3a &lt; -3\\

1 &lt; a &lt; 2\Rightarrow4 &lt; a+3 &lt; 5\\

1 &lt; a &lt; 2\Rightarrow-7 &lt; a-8 &lt; -6\\

1 &lt; a &lt; 2\Rightarrow3 &lt; 3a &lt; 6\Rightarrow 1 &lt; 3a-2 &lt; 4\\

1 &lt; a &lt; 2\Rightarrow 5 &lt; 5a &lt; 10\Rightarrow 6 &lt; 5a+1 &lt; 11\\

1 &lt; a &lt; 2\Rightarrow-6 &lt; -6a &lt; -12\Rightarrow -12 &lt; -6a &lt; -6\Rightarrow -8 &lt; 4-6a &lt; -2\\

$1 &lt; a &lt; 2\Rightarrow \frac{1}{2} &lt; \frac{1}{a} &lt; 1\Rightarrow -1 &lt; \frac{-2}{a} &lt; -2\Rightarrow -2 &lt; \frac{-2}{a} &lt; -1$

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1. 1 (to do) morning exercises. 2. He (to work) at a factory. 3. She (to sleep) after dinner. 4. We (to work) part-time. 5. They (to drink) tea every day. 6. Mike (to be) a student. 7. Helen (to have) a car. B. You (to be) a good friend. 9. You (to be) good friends. 10. It (to be) difficult to remember everything. Упражнение 2. Раскройте скобки, употребляя глаголы в Present Simple. 1. Alice (to have) a sister. 2. Her sister's name (to be) Ann. 3. Ann (to be) a student. 4. She (to get) up at seven o'clock. 5. She (to go) to the institute in the morning. 6. Jane (to be) fond of sports. 7. She (to do) her morning exercises every day. B. For breakfast she (to have) two eggs, a sandwich and a cup of tea. 9. After breakfast she (to go) to the institute. 10. Sometimes she (to take) a bus. 11. It (to take) her an hour and a half to do her homework. 12. She (to speak) English well. 13. Her friends usually (to call) her at about 8 o'clock. 14. Ann (to take) a shower before going to bed. 15. She (to go) to bed at 11 p. m. 1. I (to do) morning exercises. 2. He (to work) at a factory. 3. She (to sleep) after dinner. 4. We (to work) part-time. 5. They (to drink) tea every day. 6. Mike (to be) a student. 7. Helen (to have) a car. 8. You (to be) a good friend. 9. You (to be) good friends. 10. It (to be) difficult to remember everything. Упражнение 2. Раскройте скобки, употребляя глаголы в Present Simple. 1. Alice (to have) a sister. 2. Her sister's name (to be) Ann. 3. Ann (to be) a student. 4. She (to get) up at seven o'clock. 5. She (to go) to the institute in the morning. 6. Jane (to be) fond of sports. 7. She (to do) her morning exercises every day. 8. For breakfast she (to have) two eggs, a sandwich and a cup of tea. 9. After breakfast she (to go) to the institute. 10. Sometimes she (to take) a bus. 11. It (to take) her an hour and a half to do her homework. 12. She (to speak) English well. 13. Her friends usually (to call) her at about 8 o'clock. 14. Ann (to take) a shower before going to bed. 15. She (to go) to bed at 11 p. m.



кто не понял нужно крч эти предложение сделать на +,- и ?​