3.6: Definite integrals with fractional powers and ln

0606/12/F/M/24 — Question 7 · 9 marks · Exponentials, Log laws

(a)
Find 24(5x2)2/3dx\displaystyle\int_{2}^{4}(5x - 2)^{-2/3}\,\mathrm{d}x, giving your answer in exact form.
[4]
(b)
Find 01/2(42x+1+8(2x+1)2)dx\displaystyle\int_{0}^{1/2}\left(\frac{4}{2x + 1} + \frac{8}{(2x + 1)^{2}}\right)\mathrm{d}x, giving your answer in the form a+lnba + \ln b, where aa and bb are integers.
[5]