Porisma

A hint to get started

Carry the logarithm domain through a hence inequality

Sketch y=2/(x+1)y=2/(x+1). By sketching another suitable graph, solve 4/(x+1)≤2∣x∣4/(x+1)\le2|x|.

Hence solve 4/(ln⁡x+1)≤2∣ln⁡x∣4/(\ln x+1)\le2|\ln x|.

CJC · Lecture · Example 11

Mark critical values and decide which are allowed before selecting intervals.

Read the worked solution