№68852. Исследовать функцию и построить ее график: у = х^3 - 5х^2 +1

№68851. Решите способом подстановки систему уравнений:
{ y = x+1
{ x^2 + 2y = 1

№68850. Интересно на сайте написано решим всё, а мне никто не помогает просто игнорируют!!! :(

№68849. Властивості та графіки тригонометричних функцій

№68848. Пусть имется последовательный колебательный контур. Необходимо найти значение индуктивности, при котором будет наблюдатся резонанс напряжений, если Xc=500м, R=100Oм, U=200B, частота 25 Гц. Также следует найти ток, протекающий по данной цепи, активную, реактивную и полную мощность.

№68847. Вычислить площадь фигуры ограниченной линиями ,построить график y=x2+4x+3,x-y+3=0

№68846. Графически изобразить решение систем неравенств

№68845. Упростите выражения: скобка открываться 3 корень6 - 4 скобка закрывается в квадрате

№68844. упростите выражение 2 корень из 3 минус корень 48 плюс корень 75

№68843. Choose the correct answer

1 The plane circled over the airport until the.....was clear.
a) highway b) landing
c) runway d) terminal
2 All flights in and out of the airport came to a ..... because of the strike.
a) closure b) conclusion
c) standstill d) stoppage
3 If you carry too much luggage, the airline will charge an ..... baggage fee.
a) additional b) excess c) extra d) over
4 British Airways ..... the departure of Flight 222 to Warsaw.
a) advertise b) advise
c) announce d) notice
5 When you get to the airport, your luggage will have to be......
a) balanced b) estimated
c) sealed d) weighed
6 Because of the fog, our flight was ..... from Heathrow to York Airport.
a) deflected b) diverted
c) replaced d) reverted
7 The check.....time at the airport was eight o'clock.
a) by b) in c) out d) up
8 The.....from the airport was very tiring as we had to drive through the fog.
a) crossing b) flight c) ride d) voyage
9 It's very strange but I had a(n).....that the plane would crash.
a) intuition b) omen
c) prediction d) premonition
10 It takes a while to.....to your surroundings after a long flight.
a) adjust b) balance c) fit d) settle
11 Much stricter.....must now be taken at all airports against hijacking.
a) alarms b) precautions
c) protections d) warnings
12 The air hostess told the passengers to.....their seat belts.
a) attach b) fasten c) fix d) tie
13 To fly big passenger airliners.....long training and experience.
a) calls for b) orders
c) picks up d) requisitions
14 The plane was.....towards the runway when the fire started.
a) heading b) landing
c) sailing d) soaring
15 The.....from Warsaw to New York takes nine hours.
a) flying b) journey
c) passage d) voyage
16 I'm afraid your luggage is ten kilos.....; you will have to pay extra.
a) above b) excess
c) heavy d) overweight
17 A passenger is not allowed to.....a lethal weapon when flying by a civilian airliner.
a) be having b) be owning
c) carry d) control
18 Nobody.....that aeroplane crash.
a) died b) lived c) recovered d) survived
19 Our.....was delayed owing to bad weather conditions.
a) airline b) airway c) flight d) runway
20 When our flight was delayed, we all had a meal at the airline's......
a) account b) cost c) expense d) finance
21 Please......from smoking until the plane is airborne.
a) exclude b) refrain c) restrain d) resist
22 We.....to announce a further delay in the departure of flight BE-555.
a) apologies b) mourn
c) regret d) repent
23 Tickets booked on this flight are not......
a) assignable b) moveable
c) passable d) transferable
24 If you want a cheap air ticket you must.....well in advance.
a) book b) buy c) engage d) reserve
25 He couldn't.....his fear of flying.
a) overcome b) succeed
c) triumph d) win
26 The stewardess.....the screaming child.
a) corrected b) cured
c) recovered d) soothed
27 It was a great.....to go up in a helicopter for the first time.
a) incident b) rise c) suspense d) thrill
28 Nothing could.....me to fly except in a case of extreme emergency.
a) encourage b) induce
c) influence d) recommend

№68842. Исследовать функцию и построить ее график:

№68841. Проведите полное исследование функции y=f(x) и постройте ее
график.

№68840. Найдите точки перегиба, интервалы выпуклости и вогнутости
функций:

№68839. [green]Пж очень [/green] дам потом еще балов

№68838. ы ВЕ R 00 КЫ 22.Вычислить объем тела с помощью двойного интеграла ограниченных заданными — поверхностями х? + у? = 8, х = (, у = 0, 2= 0, х+у+ 2 = 4.