一道GMAT数学题if ° represents one of the operations +,- ,and x,is
一道GMAT数学题
if ° represents one of the operations +,- ,and x,is
k°(e+m)=(k °i)+(k °m)for all numbers k,£,
and
(1) k ° 1 is not equal to 1 ° k for some numbers k.
(2) ° represents subtraction.
if ° represents one of the operations +,- ,and x,is
k°(e+m)=(k °i)+(k °m)for all numbers k,£,
and
(1) k ° 1 is not equal to 1 ° k for some numbers k.
(2) ° represents subtraction.
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