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Mathematics
Problem
Let
k
(
x
)
=
∣
x
2
−
4
x
∣
+
1
k(x)=|x^{2}-4x|+1
k
(
x
)
=
∣
x
2
−
4
x
∣
+
1
for all real
x
x
x
. The least value of
k
(
x
)
k(x)
k
(
x
)
equals a)
4
4
4
b)
1
1
1
c)
0
0
0
d)
−
3
-3
−
3
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