The operation T is defined by x T y=1/x+1/y for all nonzero numbers x and y. If z is a number greater than 1, which of the following must be true.
I. x T (-z)=0
II. z T z/z-1=1
III. 2/z T 2/z=1
Choose the correct choice from the following answers:
A) a.) I	B) b.) I and II only	C) c) I and III only	D) d) II only	E) e) I, II and III only
Statement I is not TRUE   Statement II is TRUE   Statement III is not TRUE   Answer : d) II only
<result>D</result>
The operation T is defined by x T y=1/x+1/y for all nonzero numbers x and y. If z is a number greater than 1, which of the following must be true.
I. x T (-z)=0
II. z T z/z-1=1
III. 2/z T 2/z=1