设y=cosx^2,则dy=

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设y=cosx^2,则dy=设y=cosx^2,则dy=设y=cosx^2,则dy=dy=dcos(x²)=-sin(x²)dx²=-sin(x²)*2xdx=

设y=cosx^2,则dy=
设y=cosx^2,则dy=

设y=cosx^2,则dy=
dy=dcos(x²)
=-sin(x²)dx²
=-sin(x²)*2xdx
=-2xsin(x²)dx

-2xsinx^2