1.

If \[x\]and y are positive real numbers, then which of the following is CORRECT?

A. \[x>y\Rightarrow -x>-y\]
B. \[x>y\Rightarrow -x<-y\]
C.  \[x>y\Rightarrow \frac{1}{x}>\frac{1}{y}\]
D.  \[x>y\Rightarrow \frac{1}{x}<\frac{-1}{y}\]
Answer» C.  \[x>y\Rightarrow \frac{1}{x}>\frac{1}{y}\]


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