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Oxford Entrance Exam Problem 1

Algebra Level 2

The inequality \(x^4<8x^2+9\) is satisfied precisely when

\[1<x<3\] \[-3<x<-1\] \[-1<x<9\] \[0<x<4\] \[-3<x<3\]

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Excel in math and science

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by Andrei Golovanov

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