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=z
III. 2/z T 2/z=1  Choose the correct option.
A) a.) I	B) b.) I and II only	C) c) I and III only	D) d) II and III only	E) e) None of these
Statement I is not TRUe) None of these   Statement II is not TRUe) None of these   Statement III is not TRUe) None of these   Answer : e) None of these
<result>E</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=z
III. 2/z T 2/z=1