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**Moved from technical math section, so missing the homework template**

**Summary::**Find a general formula for the nth derivative

Hi everyone!

How would I approach and answer a Q such as this

I began by rewriting the expression in a different form, then used chain rule to each given term

I tried to work out the 1st, 2nd and 3rd derivative in order to help me spot a pattern, so that it would help me find a general formula for the nth derivative. But I can't seem to notice too much.

The only thing I see is that signs alternate as you differentiate again and again, and that it has a common factor of 1/5 to take out

Any help would be appreciated, thanks!

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