Find all strictly monotonic functions f:(0,+∞)→(0,+∞)f : (0, +\infty) \to (0, +\infty)f:(0,+∞)→(0,+∞) such that f(x2f(x))≡xf\left( \dfrac{x^2}{f(x)} \right) \equiv xf(f(x)x2)≡x.
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