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A function

Forums: Math, Functions
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uvosky
 
Reply Thu 2 Aug, 2012 04:53 am
Find a function f : R X R ---> R such that f is not always positive and
f(y, z)>0 & f(a , b)>o implies f(ay - bz , by+az)>0 & f(a+y , b+z) > 0
( R is the set of all real numbers and " X" denotes Cartesian product)
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