# Math Help - Differentiation Question

1. ## Differentiation Question

$y=e^xsin(4e^{5x})$

hints please

2. Originally Posted by iPod
$e^xsin(5e^4)$

hints please
$sin(5e^4)$ = constant

$\frac{d}{dx}(ae^x) = ae^x$

3. i understood that, however the question i have written the 1st time was incorrect, please take another look

4. Originally Posted by iPod
$y=e^xsin(4e^{5x})$

hints please
try the product rule?

f(x)=e^x
f'(x)=e^x

g(x)=(sin(4e^{5x}))
g'(x)=(cos(4e^{5x}))(4e^{5x})(5)=20e^{5x}(cos(4e^{ 5x}))

dy/dx=f(x)g'(x)+g(x)f'(x)

5. thanks very much, i got it now