Mathematics

Mathematics

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 a. (−2,0)(-2, 0) b. (0,2)(0, 2) c. (2,∞)(2, \infty) d. (−∞,−2)(-\infty, -2)

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