(9) If f is continuous on [a, b], show that b f(x)da s f (x) dx. Use the above or otherwise show that f(x) sin 2xda If (x) dac. [5 marks] (10) Express the following as definite integrals, and give justification: n 24 lim n->oo 25 i=1 lim y: - n-soon 1+