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