二,(10/9X^-1/3)+(10/9X^-4/3)=10*(X+1)/9X^4/3的计算过程.
[(10/9X^-1/3)+(10/9X^-4/3)]'
=(10/9)*{[x^(-1/3)]'+[x^(-4/3)]'}
=(10/9)*[(-1/3)*x^(-1/3-1)+(-4/3)*x^(-4/3-1)]
=(10/9)*[(-1/3)x^(-4/3)+(-4/3)x^(-7/3)]
=(-10/27)*x^(-4/3)*[1+(4/x)]
实在是不能得到你所给的答案.
估计是我没有看懂你的题目...