$$y = \log_7(e^{-x}\cos\pi x)$$
I got: $$y' = \frac {-\sin\pi xe^{-x} - \cos\pi x e^{-x}}{e^{-x}\cos\pi x\ln(7)}$$
Is that correct?
$$y = \log_7(e^{-x}\cos\pi x)$$
I got: $$y' = \frac {-\sin\pi xe^{-x} - \cos\pi x e^{-x}}{e^{-x}\cos\pi x\ln(7)}$$
Is that correct?