=4(2x2-x+1)3·(4x-1).
(2)法一:设y=u,u=1-2x2,则
y′x=y′u·u′x= (-4x)
=-(1-2x2) (-4x)
=2x(1-2x2)
= .
法二:y′=′=[(1-2x2) ]′
=-(1-2x2) ·(1-2x2)′
=2x(1-2x2) = .
(3)y′=x′ln(1-x)+x[ln(1-x)]′
=ln(1-x)+x·
=ln(1-x)-.