Предмет: Алгебра, автор: Ivankukolka

ПОМОГИТЕ ПОЖАЛУЙСТА, ДАЮ 100 БАЛЛОВ
Нужен 675

Приложения:

Ответы

Автор ответа: сок111213
1

675.

a)

(2x - 1)( {x}^{2}  + x - 3) < (x + 3)(2 {x}^{2}  - 5x + 8) \\ 2 {x}^{3}  + 2 {x}^{2}  - 6x -  {x}^{2}  - x + 3 < 2 {x}^{3}  - 5 {x}^{2}  + 8x + 6 {x}^{2}  - 15x + 24 \\ 2 {x}^{3}  +  {x}^{2}  - 7x + 3 < 2 {x}^{3}  +  {x}^{2}  - 7x + 24  \\ 2 {x}^{3}  +  {x}^{2}  - 7x + 3  -  2 {x}^{3}   -   {x}^{2}   +  7x  < 24  \\ 3 < 24

Неравенство истинно при любом значении х

б)

( {y}^{2}  - 1)( {y}^{4}  +  {y}^{2}  + 1) > ( {y}^{3}  - 2)( {y}^{3}  + 2) \\  {y}^{6}  +  {y}^{4}  +  {y}^{2}  -  {y}^{4}  -  {y}^{2}  - 1 > ( {y}^{3} ) {}^{2}  - 2 {}^{2}  \\  {y}^{6}  - 1 >  {y}^{6 }  - 4 \\  {y}^{6}  - 1 -  {y}^{6}  >  - 4 \\  - 1 >  - 4 \:  \:  |  \times ( - 1) \\ 1 < 4

Неравенство истинно при любом значении х


Ivankukolka: спасибо большое
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2. Раскройте скобки, употребляя глаголы в Present Indefinite и переведите предложения на русской язык.

1. I always (to make) my bed.
2. He sometimes (to do) morning exercises.
3. Tom (to go) to the bathroom.
4. They (come) home in the evening.
3. .Прочитайте текст, переведите 1 абзац и ответьте на вопросы.
My working day
I usually get up at 7 o'clock in the morning. I do my morning exercises, but not always, make my bed, wash and dress. Then I have breakfast. At 8 o'clock I leave home and go to school. As a rule I come to school in time as the lessons begin at 9 o'clock. I live not far from school and it usually takes me 15 minutes to get to school on foot. Usually we have 6 or 7 classes every day and after classes I return home.
At 3 o'clock I have dinner and rest a little. After that I do my homework and help my mother about the house if she needs my help. Then I have supper and if the weather is good I go for a walk with my friends and if the weather is not good I stay at home something I watch TV; sometimes I listen to music or chat with my friends over the telephone.
I never work late in the evening. At 11 o'clock I usually go to bed but sometimes I watch television till late in the evening and that's why I may go to bed very late. But I always remember the proverb: "Early to bed and early to rise makes a man healthy wealthy and wise."
Questions:
1. When do I usually get up on week days?
2. What do I do when I have free time?
3. Is my school close to me?
4. When do I usually go to bed?