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对数函数题目12

解析：

Tip

这个题作图准确很重要
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Step

A,成立

Step

B
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Step

C、D,x1+x2=0
|log2⁡(x3−1)|=|log2⁡(x4−1)|⇒(x3−1)(x4−1)=1⇒x3=1x4−1+1
x3x4=1x4−1+x4−1+2∈[92,254)
x1+x2+x3+x4=x3+x4=x3x4

Tip

(x3−1)(x4−1)=1⇒x3+x4=x3x4