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Ab is not equal to 0, then the absolute value of a divided by a plus b divided by b is equal to?
There are two cases:
A*b >0, a divided by the absolute value of a plus the absolute value of b divided by b =2;
A* b <0, a divided by the absolute value of a plus the absolute value of b divided by b =0.
If AB is not equal to 0, divide the absolute value of A by the absolute value of A plus B by the absolute value of B plus AB by the absolute value of AB
|A|/A+|B|/B+|AB|/(AB)
(1) A >0 B >0 Original formula=1+1+1=3
(2) A >0 B
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