(pq)(pq) => px(pq) qx(pq);12 Let f R → R be defined by setting f ( x) = 1 / q if x = p / q, where p and q are positive integers with no common factor, and f ( x) = 0 otherwise Show that f is integrable over 0, 1 I'm using the Darboux definition of integration, so I want to prove that for any ϵ > 0 there exists a partition P of 0, 1 such that U ( f, P) − L3, x e N}, Q= {x x≤2,x ∈ W} Find (P∪ Q) x (P∩ Q), where W is the set of whole numbers
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