More chain rule practice (K-A)

• Derivative of logₐx (for any positive base a≠1) (K-A)
• Worked example: Derivative of 7^(x²-x) using the chain rule (K-A)
• Worked example: Derivative of logâ‚„(x²+x) using the chain rule (K-A)
• Worked example: Derivative of sec(3Ï€/2-x) using the chain rule (K-A)
• Worked example: Derivative of ∜(x³+4x²+7) using the chain rule (K-A)
• Proving the chain rule (K-A)
• Derivative rules review (K-A)