calculus if y=log(7x-2) , find \frac{dy}{dx}

Question

if , find 

Answer 1

y = log(7x - 2)

y = log₁₀(7x - 2)

Using the derivative rule:

AND the chain rule:

then dy/dx = 1/[(7x - 2)ln(10)]•7 = 7/[ln10(7x - 2)]