1.17: Quotient rule and tangent to a logarithmic rational curve

0606/11/O/N/18 — Question 6 · 6 marks

A curve has the equation y=ln(2x2+3)5x+2y = \dfrac{\ln(2x^{2} + 3)}{5x + 2}.
(i)
Show that dydx=54ln3\dfrac{\mathrm{d}y}{\mathrm{d}x} = -\dfrac{5}{4}\ln 3 when x=0x = 0.
[4]
(ii)
Hence find the equation of the tangent to the curve at the point where x=0x = 0.
[2]