1,y‘=30x^2*(x^3-1)^9
2,y'=6*(5-sinxcosx)*(x+cos^2 x)^2
3,y'=(4/3x^2-2x+1/3)/(x-2)(x^2+1)过程呀就是不知道过程3题都是求取复合函数的导数,把x^3-1,x+cos^2 x,(根号x^2+1)/(根号开三次方下x-2)]看成整体即可,如第一题:y'=10(x^3-1)^9*(x^3-1)'=10(x^3-1)^9*3x^2=30x^2*(x^3-1)^9