Question
If and , what is one possible value of ?
Hint:
Hint:
is called the absolute value of x . The value of the expression is given as
To find the value of , we first find value of x and y seperately, and then find absolute value of their product. There can be four different cases here, two cases for each equation. We will take the case where both the values are positive.
The correct answer is: 1,3,4,12
We are given two equations and
To find:
Considering, the first equation, we have
As this is true for all values of x ,
We take such that
Then
Thus, we get
Solving this equation, we have
Next, consider the equation
As this is true for all values of y ,
So, we have
Solving this equation for y , we have
Thus, we get values of x and y as
From here, we have,
As so by definition, we get
Therefore, one possible value of is 3.
Note:
This problem can have different answers if solved differently. Instead of making positive, if we took , we would get a different answer. Similarly, for , we get a different value of . If we take both negative, we will get another answer.
Thus, we can get 4 answers: 1,3, 4, 12.
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