A biological culture's sensitivity to a stimulant, SSS, is modeled as a function of the concentration ccc (in mmol/L) by the formula:
S=(12c4−8c)9S = \left( \frac{1}{2}c^4 - \frac{8}{c} \right)^9S=(21c4−c8)9
Use the chain rule to find an expression for the rate of change of sensitivity with respect to concentration, dSdc\frac{dS}{dc}dcdS.
Practise Edexcel A Level Maths 9.3 The Chain Rule with exam-style questions for A Level Maths. 50 questions, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.