Окружность разделена на три дуги в отношении 5 : 6 : 7 и через точки деления проведены касательные к окружности. найти углы образовавшегося треугольника. сделать рисунок. рисунок я сделал. все разделил. а вот как найти углы треугольника который образовался, не могу.

найдём производную функции f(x)=2x³ -3x² -1

f'(x)=6x² - 6x

6x² - 6x= 0

6x(x -1) = 0

1) 6x = 0

x₁ = 0

2) x -1=0

x₂ = 1

график функции f'(x)=6x² - 6x представляет собой квадратную параболу веточками ввех, следовательно,

при х∈(-∞; 0]       f'(x)> 0    ⇒    f(x) возрастает

при х∈[0; 1]          f'(x)< 0    ⇒    f(x) убывает

при х∈[1; +∞)      f'(x)> 0    ⇒    f(x) возрастает

в точке х = 0 локальный максимум y mах = -1

в точке х =1  локальный минимум y min = 2 -3 -1 = -2

 

1. i cleaned and aired the room. 2. have you  read all these books?

3. who wrote these letters ? 4. the secretary has just typed the letter.

5. she showed me the picture which her husband had painted.

6. my parents will not allowe me to go there. 7. they have told him everything, so he knows what to do now. 8. you must answer all the questions. 9. john has left the door open open. 10. we met betty at the station. 11. the girl's parents did not allow her to go to the concert. 12. she said that they had not hung up the new timetable on the notice board yet . 13. the guests ate the roast chicken with appetite. 14. it was so dark, that we  could not see the houses. 15. he  has not turned the light  off yet. 16. the boy's father punished him for misbehaving. 17. by three o'clock we  had prepared everything. 18. the children wrote the dictation without mistakes. 19. who wrote the poem ? 20. nelly washed and ironed her dress. 21. my friends didn't blame me for the mistakes. 22. the students had looked through the papers and corrected them by the next lesson. 23. our neighbours built this house last year. 24. the secretary has just sent the letter. 25. they will  translate this article at the lesson on tuesday. 26. when will you  return this book to the library?