函数f(x)=√[2-(x+3)/(x+1)]的定义域为A,g(x)=lg[(x-a-1)(2a-x)](a

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函数f(x)=√[2-(x+3)/(x+1)]的定义域为A,g(x)=lg[(x-a-1)(2a-x)](a
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函数f(x)=√[2-(x+3)/(x+1)]的定义域为A,g(x)=lg[(x-a-1)(2a-x)](a
函数f(x)=√[2-(x+3)/(x+1)]的定义域为A,g(x)=lg[(x-a-1)(2a-x)](a

函数f(x)=√[2-(x+3)/(x+1)]的定义域为A,g(x)=lg[(x-a-1)(2a-x)](a
f(x)=√[2-(x+3)/(x+1)]的定义域为A,g(x)=lg[(x-a-1)(2a-x)](a0,或者x-1≤0且x+10且2a-x>0,或者x-a-1a+1,所以2a>a+1
所以x2a不成立
所以x>a+1且x

1 2-[(x+3)/(x+1)]≥0
x-1/x+1≥0
-1<x≤1
即A=(-1,1]
2 (x-a-1)(2a-x)>0
[x-(a+1)](x-2a)<0
2a<x<a+1
∵B∪A=A
∴B∈A.
∴2a≥-1且a+1≤1
a≥-0.5且a≤0
∴-0.5≤a≤0