If a, b are all nonzero rational numbers, and a/|a|plus b/|b|=0, find the value of ab/|ab|? Pro, If a, b are all nonzero rational numbers, and a/|a|plus b/|b|=0, find the value of ab/|ab|? My dear,

If a, b are all nonzero rational numbers, and a/|a|plus b/|b|=0, find the value of ab/|ab|? Pro, If a, b are all nonzero rational numbers, and a/|a|plus b/|b|=0, find the value of ab/|ab|? My dear,

The difference between a and b according to the preceding conditions
Then ab/|ab|=-1

The difference between a and b given by the preceding conditions
Then ab/|ab|=-1

(1 Of 2 of 1-2)(1 of 2 of 1-3)(1 of 2 of 1-4).(1 of 2 of 1-2012)(1-2013 What is equal to 1),

(1 To the second power of 1-2)(1 to the second power of 1-3)(1 to the second power of 1-4).(1 to the second power of 2012)(1 to the second power of 2013)=(1-1/2)(1+1/2)(1-1/3)(1+1/3)...(1-1/2012)(1+1/2012)(1-1/2013)(1+1/2013)=1/2x3/2x2/3x4/3x... x...