f(x) = [√(4x-x^2)+2]/(x+3)根号下无负数,4x-x^2≥0,x(x-4)≤0,0≤x≤4分母不为零,x+3≠0∴定义域：0≤x≤4 f(x) = [√(4x-x^2)+2]/(x+3)f’(x) = { (x+3)*(4-2x)/[2√(4x-x^2)] - [√(4x-x^2)+2]*1}/(x+3)^2= { (x...