f(x) = ax² +x ≤1 对任意x∈[0,1]恒成立x=0时,0≤1成立x≠0时,a≤ (1-x) / x²令g(x) = (1-x) / x² ,x∈(0,1]g'(x) = [-x² -(1-x)2x] / x⁴= (x-2) / x³∵x∈(0,1]∴g'(x)...