On the set Q+ of all positive rational numbers, the operation O is defined by the formula a O \(\rm b = \frac{{ab}}{2}\), then the inverse of 8 is

On the set Q+ of all positive rational numbers, the operation O is def

1.	On the set Q+ of all positive rational numbers, the operation O is defined by the formula a O \(\rm b = \frac{{ab}}{2}\), then the inverse of 8 is
A.	1/8
B.	8
C.	2
D.	1/2
Answer» E.

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