ChallengeMedium ShareChallenge · Medium problemA function fff satisfies f(x)+2f(1−x)=x2f(x)+2f(1-x)=x^2f(x)+2f(1−x)=x2 for all real xxx. What is f (13)f\!\left(\tfrac13\right)f(31)?A527\tfrac{5}{27}275B29\tfrac2992C727\tfrac{7}{27}277D827\tfrac{8}{27}278E13\tfrac1331Check Show answer Walk through it step by step Practice more like this