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Artur43
@Artur43
July 2022
2
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Решите уравнение:
[tex] \sqrt{ \frac{x-4}{2x+15} } + \sqrt{ \frac{2x+15}{x-4} } = 5,2[/tex]
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Checov7400
И обязательно делать проверку)))
второй корень проверяется устно...
-7_36/49 - 4 = -11_36/49 = -575/49
-2*379/49 + 15 = (735 - 758)/49 = -23/49
(575/49) : (23/49) = 575/23 = 25
5 + (1/5) = 5.2
2 votes
Thanks 1
Checov7400
пропустила -15,4 будет (-15,4-71,6)/11,27=приблизительно -7,73
oganesbagoyan
t +1/t =5 +1/5 ⇒[ t =5;t =1/5.[((x-4)/(2x+15))=5;√((2x+15)/(x-4))=1/5
oganesbagoyan
t +1/t =5 +1/5 ⇒[ t =5;t =1/5. [√((x-4)/(2x+15))=5 ; √((2x+15)/(x-4))=1/5 oganesbagoyan
LFP
Verified answer
Решение в приложении.
1 votes
Thanks 1
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Answers & Comments
второй корень проверяется устно...
-7_36/49 - 4 = -11_36/49 = -575/49
-2*379/49 + 15 = (735 - 758)/49 = -23/49
(575/49) : (23/49) = 575/23 = 25
5 + (1/5) = 5.2
Verified answer
Решение в приложении.