The curve C C\,C has the equation
y=(12−x)lnxy = (12 - x)\ln xy=(12−x)lnx, x>0x > 0x>0
Find dydx\displaystyle \frac{dy}{dx}dxdy.
C C\,C has a stationary point at PPP.
Show that the xxx-coordinate of P P\,P lies between 4.5 and 5.
Show that the xxx-coordinate of P P\,P is a solution of x=121+lnxx = \dfrac{12}{1 + \ln x}x=1+lnx12.
Use the iteration formula
xn+1=121+lnxn\displaystyle x_{n+1} = \frac{12}{1 + \ln x_n}xn+1=1+lnxn12
with x0=4.75x_0 = 4.75x0=4.75 to find, to three decimal places, the values of x1x_1x1, x2 x_2\,x2 and x3x_3x3.