1. The problem statement, all variables and given/known data Let f : Rn ----> R. i) Let E1 and E2 be two Jordan regions in Rn such that E1 C E2 Suppose f is integrable on E2. Then, show that f is integrable on E1. ii) Suppose f is continuous on Rn. Then, show that f is integrable on any Jordan region E in Rn. Here, E is bounded. 3. The attempt at a solution These both seem really easy to me and i cant figure it out. For part two, is it enough to show that E is of measure zero? and how do you do that?