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SAHARIA
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July 2022
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Решите задание по типу заданий 7 ЕГЭ математика профильный уровень:
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ludmilagena
Verified answer
V =производная от x(t) по t ---> v=x' (t)
x' (t) =-t³ *4/2 +7*3t² -7*2t -1=-2t³+21t² - 14t -1
x' (3)=-2*27+21*9 -42 -1= -54+189 - 42 -1= 92
v=92 м/c
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Answers & Comments
Verified answer
V =производная от x(t) по t ---> v=x' (t)x' (t) =-t³ *4/2 +7*3t² -7*2t -1=-2t³+21t² - 14t -1
x' (3)=-2*27+21*9 -42 -1= -54+189 - 42 -1= 92
v=92 м/c