кто знает, как найти "похідну" : f(x) = x^2 - 3x ___________ = x + 1

Для обозначения высших десятичных разрядов в славянском языке использовались названия: 10 тысяч назывались тьмой, 10 тем- легионом, 10 легионов -леодром и тд.д.Какие из чисел меньше легиона тьмы? а) 125001400 б) 100000 в) 20072007 г) 111111111 д) 10101010

Complete the sentences about mobile phones. Write the correct form of the verb in brackets: passive or active, as well as the correct tense. When there is also an adverb in brackets, put this in the correct place in the sentence.                                                                                 

•   The first real mobile phone________________ 1 (test) by the Swedish police

 in 1946.

•   About six calls__________2 (make) before the battery ran out.

•   But modern mobile telephony_____________________3 (begin) on April 3rd,

1973, when a call_________________________4 (make) while walking the streets of

New York.

•   In October 1981, the first cell phone network with automatic roaming between countries _________________________5 (set up) in the Nordic countries.

•   Since then, an incredible number of cell phones_____________________________6 (sell)

and the system________________________7 (be) much more successful than people

 originally_____________________________8 (think).

•   Today, in most of Europe, wealthy parts of Asia and Australasia, mobile phones

_____________________________9 (own) by the majority of the adult, teenage, and even

child population.                                                                                                      

•   Relatively cheap and quick to install, mobile phone networks _____________________________10 (also introduce) throughout the developing world.

•   In the future, more features_________________ 11 (included) in mobile

phones from other handheld devices.

•   This_____________________________12 (already happen) to some extent, with MP3

players, digital cameras, etc.

•   New technologies and applications for mobile phones______________________13(constantly develop).

•   However, some people_____________________________14(say) that the mobile phone of

the future________________________________15 (implant) in our own bodies.

•   In fact, research___________________________16 (carry out) on a device that _____________17 (insert) into a tooth and the sound__________________________18 (transmit) through the bones and into the ear.

Вычеслите,сколько энергии выделяется при полном сгорании угля массой 15кг,керосина массой 200г,Удельная теплота сгорания угля,составляет 3,4*10.7 степени Дж/кг,удельная теплота сгорания керосина 4,б"10г Дж\кг

Как разделить слово платье на слоги. Оч надо. Плиз)))