помогите решить 1)xy'+y=e ^-x 2)y''-3y'+2y=e^-x+x - №28678375

помогите решить
1)xy'+y=e ^-x
2)y''-3y'+2y=e^-x+x
- Предмет:
  Математика
- Автор:
  donaldsteele
- 5 лет назад

Ответы 1

первый пример:13.второй пример:4
- Автор:
  joaquin
- 5 лет назад
- 0
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The earliest written history of Egypt was probably put down than six thousand years ago. Six thousand y more It is a long period of time for us to look back. The Egyptians hav seen the civilizations of many nations rise up, progress, flourish, decay and pass away Perhaps the first thing for a traveller making a tour of the Nile Valley is to look for the pyramids particularly the P mids of Giza These tombs of the ancient pharaohs are built on the west bank of the Nile in the neighbourhood of Memphis, the capital of ancient Egypt. The construction of the pyramids began several thousand years ago. The first tomb of this kind was, ac cording to tradition, erected by Imhotep His name became legendary among later generations of Egyp ians who considered him to be not only an architect, but also a magician, an astronomer and the father of medicine as we The Pyramids of Giza are edifices of gigantic size. Never have monarchs or conquerors since had such massive tombs. The largest of them all the Pyramid of Cheops, rises to a height more than 150 metres. In ancient times Cheops reigned over the country in the third millenium B when the outer casing was still in place, it was probably higher than at present. The base of the pyramid covers an area of more than a dozen acres few thousand limestone blocks of over a cubic metre each were hewn from the hills on the other side of the Nile over the river, and- by enormous effort of human labour, drawn pushed or rolled to their places in the monumental pile. Cheops ordered a tomb to be built for himself as soon as he ascended the throne. Its weight is tremendous, and it took about thi to complete the whole work. Thousands of men were employed at the construction site at a time. Now, the question is what the object of all this immense la our and expense was. Was it to glorify the ambitious ru or to make his name live for ever? The answer to this question is to be found in the beliefs of the ancient Egyptians. Since very early times they believed man to be composed of body and spirit They thought that the spirit could remain alive after physical death ii the body was preserved. Thus every measure was taken tect the body from destruction. Of course it was only the migh nd the super-wealthy who could get stone tombs to be erected for their burials. The ordinary people were buried in pits dug in the sand
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