Let . Then the real values of satisfying the inequality…

MATHEMATICS · Multi correct · A Level · Mathematics · Algebra and Functions · Algebra and Functions

Problem

Let f(x)=1−x−x3f(x)=1-x-x^3. Then the real values of xx satisfying the inequality 1−f(x)−f3(x)>f(1−5x)1-f(x)-f^3(x)>f(1-5x) are (1) (−2,0)(-2,0) (2) (0,2)(0,2) (3) (2,∞)(2,\infty) (4) (−∞,−2)(-\infty,-2)

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