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Найдите корень уравнения 4х^2+13х+10=0, удовлетворяющий неравенству -5х+2>=-3х+5.
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Предмет:
Алгебра -
Автор:
berniecuze - 5 лет назад
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Ответы 1
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Из неравенства:-2x>=3x<=-1,5Возвращаемся к уравнению:D=169-160=9Корень из D=3,=>x1=(-13-3)/8=-2x2=(-13+3)/8=-1,25(не подходит)Ответ: x=(-2)
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Автор:
orestesgkb4 - 5 лет назад
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0
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Open the brackets using the appropriate form of the Infinitive.
A few months after Arthur Ainslie had lost his job he came home and found that his wife was giving tea to a round-faced man. They appeared (to have) a good time.
"Good Lord, it's Dicky Soames!" cried Arthur.
Dicky Soames was his wife's cousin who was known (to be) in love with Adela once. But Adela married Arthur and Dicky Soames went to Melbourne to join his — and Adela's — uncle. Arthur and Adela were quite happy, but Arthur still continued hating Dicky though there was no reason for it.
Twice in the past year the Ainslies had got letters from Dicky. And each time, though Arthur knew that the letters were (to hand) to Adela, he tore them to pieces and threw them into the fire without reading them. He did not want Adela (to disturb) by Dicky's letters, so he explained it to himself at the time.
Arthur and Dicky shook hands.
"I hope you have had a nice chat," Arthur said.
Dicky laughed, "Well, it was I who've been talking all the time.
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Adela looked at her husband. "Uncle Tom is dead," she explained, "and Dicky has come into money." Then she turned to her cousin: "Tell Arthur the rest."
Dicky for some reason or other seemed (to be uncomfortable). He cleared his throat several times before he said: "Uncle Tom left Adela 5,000."
"But that is marvellous!" Arthur said. "You don't know what that means to us. How kind of Uncle Tom (to think) of us."
Arthur was too delighted (to notice) that Dicky looked still more uncomfortable, but now he noticed it at last. "Why, what's the matter?" he asked.
"Well, you see," Dicky said, "when Uncle Tom got paralyzed he began to get funny. He was very angry with Adela that she had never answered the two letters I wrote to her for him. You know how particular old people are about such things. He said he expected his letter (to answer), and changed his will, leaving Adela's part to hospitals. Shortly before his death I spoke to him again saying that the will needed (to rewrite), but he said he was too weak (to trouble) with such matters or (to tell) what to do and he did not want the will (to change)."
Dicky stopped and gave Arthur a look that made him (to feel) quite weak. "It's strange about those two letters. I've often wondered what happened to them."
Arthur's face was as white as paper. Adela faced Dicky: "They were sure (to lose) in the post," and she took her husband's ice-cold hand. At that moment Arthur realized that she knew everything.
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Ответов:
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