MathematicsMedium210×since 2002Q3303If ∫0x \int\limits_0^x \,0∫xf(t) dt = x² + ∫x1 \int\limits_x^1 \,x∫1 t²f(t) dt then f '(12)\left( {{1 \over 2}} \right)(21) is -A1825{{18} \over {25}}2518B625{{6} \over {25}}256C2425{{24} \over {25}}2524D45{{4} \over {5}}54Check answerSkip