Given that y=ln(7x)y = \ln(7x)y=ln(7x), find dydx\frac{dy}{dx}dxdy. Select the correct option:
A: dydx=1x\frac{dy}{dx} = \frac{1}{x}dxdy=x1
B: dydx=7x\frac{dy}{dx} = \frac{7}{x}dxdy=x7
C: dydx=17x\frac{dy}{dx} = \frac{1}{7x}dxdy=7x1
D: dydx=ln(7)\frac{dy}{dx} = \ln(7)dxdy=ln(7)
Practise Edexcel A Level Maths 9.2 Differentiating exponentials and logarithms with exam-style questions for A Level Maths. 23 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.