f(x)=4ex+lnxf(x) = 4e^x + \ln xf(x)=4ex+lnx
Find f′(x)f'(x)f′(x)
Find f′′(x)f''(x)f′′(x)
57 exam-style questions on Edexcel A Level Maths 9.9 Using Second Derivatives. Each one has a worked solution and a mark scheme showing where the marks go.