4\\ f>4 \vee f<-4\\ f\in(-\infty,-4)\cup(4,\infty)"> ∣ f ∣ > 4 f > 4 ∨ f < − 4 f ∈ ( − ∞ , − 4 ) ∪ ( 4 , ∞ )
To solve 4"> ∣ f ∣ > 4 , the solutions are found by splitting the inequality into two cases: 4"> f > 4 and f < − 4 . The final answer is f ∈ ( − ∞ , − 4 ) ∪ ( 4 , ∞ ) .
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