①记函数f(x)=√(x-1/x+1)的定义域为A,g(x)=lg(x-a-1)(2a-x)(a
2个回答
由题意,要使得函数f(x)有意义,须使得:
2-[(x+3)/(x+1)]≥0且x+1≠0
即(x-1)/(x+1)≥0且x≠-1
易解得-1
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