8. Решите уравнение [x^2] = 9.
А) 3
B) -3
C) (-√10; -3] [3; √10)
D) [-√10;-3] [3;√10]
А) 3
B) -3
C) (-√10; -3] [3; √10)
D) [-√10;-3] [3;√10]
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Answers & Comments
x^2=9
x=+_3
x=-3
x=3
x вниз(1)=-3,x вниз(2)=3
Ответ:А)3