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differentiate e^-2y with respect to x.

Quote: Originally Posted by plopSDCSDC differentiate e^-2y with respect to x. Its a chain rule problem... $\displaystyle \frac{\,d}{\,dx}\left[e^{-2y}\right]=e^{-2y}\cdot\frac{\,d}{\,dx}\left[-2y\right]$ What do you think $\displaystyle \frac{\,d}{\,dx}\left[-2y\right]$ is?? --Chris