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The application of mathematical inequality in senior one! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
Solve a, and you can get A= 1/x+ 1.

B is1/x-1>; 1, i.e.1/x >; 2

A is a subset of B, so it also satisfies1/x >; 2

Therefore, A & gt2+ 1=3.

A> III

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