Logx log. Log_(2)(4-x)+log_(2)(1-2x)=2log_(2)3. log2(2x+1)>4. log 4 (2x-1)/x+1 < -1/2. log10 1000.

Logx log. Log_(2)(4-x)+log_(2)(1-2x)=2log_(2)3. log2(2x+1)>4. log 4 (2x-1)/x+1 < -1/2. log10 1000.
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