To solve |2-5x| < =
0
Solution:
If 2-5x is
< 0 then |2-5x| = 5x-2 by definition . So 5x-2 < 0 by
definition.
It is a
contradiction
If 2-5x > 0, then |2-5x| =2-5x by
definition. So 2-5x < 0 a contradiction.
So x
> 2/5.
2 < 5x, x
>2/5.
So x cannot be greater than 2/5 and x cannot
be less than 2/5.
Therefore x = 2/5 is the only value that
satisfies |2-5x| < = 0.
|
No comments:
Post a Comment