An inequality problem in Senior High School~~ 10. It is known that P > 0, Q > 0, the median of p q is 1 / 2, and x = P + 1 / P, y = q + 1 / Q, then the minimum value of X + y is () A．6 B．5 C．4 D．3

p+q=1
x+y=p+q+(p+q)/pq=1+1/pq
Because PQ

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