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log₂(2x + 1) > 4log₂(2x + 1) > log₂2⁴Так как основание логарифма больше единицы, функция log₂x - возрастающая, значит2x + 1 > 162x > 15x > 7,5Ответ: x ∈ (7,5 ; + ∞)
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Автор:
janetta - 5 лет назад
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sydneyjxyy - 5 лет назад
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^ Прочитайте текст. Определите, какие из утверждений А5 — А8 соответствуют содержанию текста
(1 — True), какие не соответствуют (2 — False) и о чём в тексте не сказано, то есть на основании текста нельзя дать ни положительного, ни отрицательного ответа (3 — Not stated).
Dick and Matcham went to the door of the hut and opened it. Hugh, the ferryman, greeted Dick whom he had known since his childhood and stared at Matcham.
«Good day, old ferryman,» said Matcham. «Please give us your boat - we are in a hurry.» The ferryman grumblingly went to the bank and pushed his boat into the river. Then Dick led in the horse, and Matcham followed. In the river there were many islands covered with willows. Rowing across the river Hugh told Dick to threaten him with his gun, for he was afraid of the outlaw John Fenne and his men, who were probably hiding in the willows. He said they would kill him if they saw that he was willingly helping any friends of Sir Daniel, their enemy. «I can help you, master,» he said, «if it seems that I do it out of fear.»
In spite of Dick's protest Hugh brought the boat to the bank among the willows, far from the path. Suddenly they heard a shout from one of the islands in the river and the sound of breaking branches, as if somebody was running through the wood. «That is John Fenne himself, probably,» cried Hugh.
«Threaten me with your gun, good Dick. I have tried to save your life, now save mine.» Dick had no time to answer, when the boat ran into a thicket of willows with a crash. Matcham, pale, but calm, jumped out; Dick tried to lead the horse out of the boat, but couldn't get through the thicket with the animal.
A tall man appeared on the bank of one of the islands with a gun in his hand. He shot Dick's horse, and when falling the poor animal upset the boat. Dick fell into the water. (By R. L. Stevenson)
A5 The ferryman had known Dick since he was a boy. l)True 2) False 3) Not stated
^ A6 Dick threatened the ferryman with his gun in order to get the boat l)True 2) False 3) Not stated
A7 They heard a shout of John Fenne from one of the islands. 1) True 2) False 3) Not stated
A8 Dick's horse was shot by a tall man. I) True 2) False 3) Not stated
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