求下列函数的导数
1.y=(x²-1)³
y'=3(x²-1)²(2x)=6x(x²-1)²
2.y=sin²[1-(1/x)]
y'=2sin[1-(1/x)]cos[1-(1/x)](1/x²)
=(1/x²)sin{2[1-(1/x)]}=(1/x²)sin[2(x-1)/x].
求下列函数的导数
1.y=(x²-1)³
y'=3(x²-1)²(2x)=6x(x²-1)²
2.y=sin²[1-(1/x)]
y'=2sin[1-(1/x)]cos[1-(1/x)](1/x²)
=(1/x²)sin{2[1-(1/x)]}=(1/x²)sin[2(x-1)/x].