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50. Jika [tex]$x=(5)^{-7}$[/tex] maka:

A. [tex]$x \ \textgreater \ y$[/tex]

B. [tex][tex]$x \ \textless \ y$[/tex][/tex]

C. [tex]$x = y$[/tex]

D. [tex]$x$[/tex] dan [tex][tex]$y$[/tex][/tex] tidak dapat ditentukan