To solve the problem, first solve the inequality and find the set B, and then discuss it according to whether A is an empty set.

The process is as follows:

The calculation problem (1) is deformed according to the nature of logarithm, and the simplified result = 2 (2) General score, square difference formula and complete square formula result = 2 (a+b)/(a-b).

The process is as follows:

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