Question
Which equation does NOT have the set of all numbers as its solution?
1. |-x| = |x|
2. ||x|| = |x|
3. |-x| = -(-(-x))
4. -(-x) = x
I need help with this problem.
1. |-x| = |x|
2. ||x|| = |x|
3. |-x| = -(-(-x))
4. -(-x) = x
I need help with this problem.
Answers
Bosnian
3.
Becouse :
| - x | = x
- ( - ( - x ) ) = - x
| - x | = - ( - ( - x ) ) mean:
x = - x
That is true only for x = 0
Becouse :
| - x | = x
- ( - ( - x ) ) = - x
| - x | = - ( - ( - x ) ) mean:
x = - x
That is true only for x = 0
Steve
Actually, since -(-(-x)) = -x
we have
|-x| = -x
which is true for all x <= 0
Still the correct answer, though.
we have
|-x| = -x
which is true for all x <= 0
Still the correct answer, though.