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20 12 Jiangxi college entrance examination math problem 7
7. In the right triangle ABC, point D is the midpoint of hypotenuse AB and point P is the midpoint of line segment CD, then (the square of the modulus of pA vector+the square of the modulus of Pb vector) /PC.

Square of vector module =

A.2 B.4 C.5 D. 10