How do you know whether to use chain, product or quotient rule?
Think about the order of operations. What's the last operation you would do if you had a number and were doing arithmetic.
Last operation is multiply. Use the product rule.
Last operation is division, use the quotient rule.
Last operation is raise to the 9th power, but it's not just
Use the derivative of the 7th power and (because it's not simply
If you rewrite