这是过程
y=(1-x)^2.√x/(x+3)^3lny = 2ln(1-x) + (1/2)lnx - 3ln(x+3)(1/y). dy/dx = -2/(1-x) + 1/(2x) - 3/(x+3)dy/dx = [-2/(1-x) + 1/(2x) - 3/(x+3)].(1-x)^2.√x/(x+3)^3
