em #4: What is the domain of the function f(x, y) = x¹y¹/5 - 9 ln.x? (A) {(x, y):x>0} (B) {(x,y) :x ≥ 0, y > 0} (C) {(x,y) :x>0, y ≥ 0} (D) {(x, y) : x ≥ 0, y ≥ 0} (E) {(x,y):y>0} (F) {(x,y):x>0, y > 0} (G) {(x,y):y> 0} (H) {(x,y):x ≥ 0}

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