求导数 y=(-3x^4+3x^2-5)/x^3

问题描述:

求导数 y=(-3x^4+3x^2-5)/x^3

  1. y=(-3x^4+3x^2-5)/x^3

  2. y=1/(1+sinx)

  3. y=1/(1-x)

    求详细过程,谢谢.

  1)y = (-3x^4+3x^2-5)/x^3,y' = [(-12x^3+6x)*(x^3)-(3x^2)*(-3x^4+3x^2-5)]/x^6 = ……;  2)y = 1/(1+sinx),y' = -[1/(1+sinx)²]*cosx = ……;  3)y = 1/(1-x),y' = -[1/(1-x)²]*(-1) = 1/(...