f(x)>=3
| x-3 |+| x-2 |+k & gt; =3
|x-3|+|2-x| >=3-k
|x-3|+|2-x| >=|x-3+2-x|=|- 1|= 1
∴ 1>; =3-k
k & gt=2
(2)
k= 1
f(x)& lt; 3x
| x-3 |+| x-2 |+ 1 & lt; 3x
When x
3-x+2-x+ 1 & lt; 3x
x & gt6/5
∴6/5<; x & lt2
When 2
3-x+x-2+ 1 & lt; 3x
x & gt2/3
2/3 & lt; X< three
When x & gt=3 hours
x-3+x-2+ 1 & lt; 3x
x & gt-4
∴x>; =3
In a word, take the trade union as an example.
{ x | 6/5 & lt; X<2 or x & gt2/3}
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