3.75: Differentiate y=x3lnxy=x^{3}\ln x; definite integral

0606/13/O/N/24 — Question 7 · 6 marks

(a)
Given y=x3lnxy=x^{3}\ln x, find dydx\dfrac{\mathrm{d}y}{\mathrm{d}x}.
[2]
(b)
Hence find 12x2lnxdx\displaystyle\int_{1}^{2} x^{2}\ln x\,\mathrm{d}x in the form lna+b\ln a+b.
[4]