y=e^-x^2,求dy
问题描述：
y=e^-x^2,求dy
答
dy=de^(-x^2)
=e^(-x^2)d(-x^2)
=-2xe^(-x^2)dx
y=e^-x^2,求dy
dy=de^(-x^2)
=e^(-x^2)d(-x^2)
=-2xe^(-x^2)dx