Предмет: Алгебра, автор: ilhomovnamarjona82

9/5-√7+22/7+√5-1/√7+√5

Ответы

Автор ответа: Universalka

$\displaystyle\bf\\\frac{9}{5-\sqrt{7} } +\frac{22}{7+\sqrt{5} } -\frac{1}{\sqrt{7} +\sqrt{5} } =\\\\\\=\frac{9\cdot(5+\sqrt{7} )}{(5-\sqrt{7})\cdot(5+\sqrt{7} ) } +\frac{22\cdot(7-\sqrt{5} )}{(7+\sqrt{5} )(7-\sqrt{5} )} -\frac{1\cdot(\sqrt{7} -\sqrt{5}) }{(\sqrt{7} +\sqrt{5} )(\sqrt{7} -\sqrt{5} )} =\\\\\\=\frac{9\cdot(5+\sqrt{7} )}{25-7 } +\frac{22\cdot(7-\sqrt{5} )}{49-5} -\frac{1\cdot(\sqrt{7} -\sqrt{5}) }{7-5} =$

$\displaystyle\bf\\=\frac{9\cdot(5+\sqrt{7} )}{18 } +\frac{22\cdot(7-\sqrt{5} )}{44} -\frac{1\cdot(\sqrt{7} -\sqrt{5}) }{2} =\\\\\\=\frac{5+\sqrt{7} }{2} +\frac{7-\sqrt{5} }{2} -\frac{\sqrt{7} -\sqrt{5} }{2} =\\\\\\=\frac{5+\sqrt{7}+7-\sqrt{5}-\sqrt{7} +\sqrt{5} }{2} =\frac{12}{2} =6$

valerij2103005: Здравствуйте! Могу я Вас попросить, помочь мне решить алгебру? Если у Вас будет желание и время, то задания в моем профиле. Буду вам очень благодарна!

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Биология, автор: aliyanabieva6

Конспект на тему Цитоплазма. Безмембранные и мембранные органоиды клетки : эндоплазматическая сеть, рибосомы, коплекс Гольжди

Пж помогите

1 год назад

Предмет: Математика, автор: sablindanil029

Срочно!!! Помогите!!!10Балллов!!!Тест!!!

1 год назад

Предмет: Английский язык, автор: blackchurka425

Раздаточный материал с упражнениями урока по 2 серии мультсериала «Over the garden wall"
Если можно объяснение

Lughnasadh is an ancient Celtic festival _________ (honor) the Celtic god Lugh, hence the name Lughnasadh. Lughnasadh is a festival said to have begun by the god Lugh in _______________ (remember) of his mother who had died of "exhaustion after clearing the plains of Ireland" for harvest. The __________ (cut) of the first of the corn is an ancient tradition and assured for a ___________(bounty) harvest that year and the year following. It was also believed that Lughnasadh was celebrated on the hilltops, closer to the ever-dying Sun and closer to the shining god Lugh. ______________ (tradition) foods included bread and bilberries.

Other Irish Celtic traditions of Lughnasadh included sacred pilgrimages to holy wells and springs, as well as the traditional __________ (light) of bonfires in honor of the Sun, the spirits of ancestors, and the gods.

In England, Lughnasadh was called Lammas which means Loaf-mass. It was traditional to bake a loaf of bread using the first crop yielded at the first harvest. Many people would take that loaf to church as an _____________ (offer), while others still would use it in magic practices to _____________ (sure) for a __________ (plenty) harvest over Autumn. The idea behind harvest festivals is to honor the earth - that the grain dies so that the people may live. While using the first harvest's bread in pagan practice was common, believe it or not the Church also used the first loaf of harvest bread in a type of magic too. They would split the bread into four pieces and then place each of the four pieces in the corners of a barn or field to bring about a good _________ (harvest) season.

In ___________ (add) to these traditions, both the _____________ (Ireland) at Lughnasadh and the English during Lammas celebrated their ancestors with dancing and games. The games played at Lughnasadh are theorized by some to be the ___________ (begin) of the Olympic Games. It is also thought that the ______________ (celebrate) of Lughnasadh gave way to the annual state fairs in the United States today!

The main idea behind celebrating this beautiful sabbat is that you are acknowledging your ______________ (grateful) to the earth for giving us her __________ (die) bounty this year. We are also preparing for the rest of the harvesting season and henceforth the winter. We also should be paying homage to the ever-dying Sun, who is making way for the Moon's triumphant reign of the sky.

1 год назад