# Finding a derivative

1. Jan 11, 2006

### chantella28

Hey guys,
I have a calculus problem that should be easy but I haven't taken calc in a few years so I can't remember where to begin. If somebody could give me some help with this, that would be great

find the following derivative: y=5^(3-3x)

2. Jan 11, 2006

### StatusX

You know the derivative of e^x and the chain rule (right?), so just use these along with the fact that:

$$5^{a}=e^{a \ln 5}$$

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