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Inequalities
hard
0:00.0
For what
k
k
k
is
x
2
−
k
x
+
k
>
0
x^2 - kx + k > 0
x
2
−
k
x
+
k
>
0
for all
x
x
x
?
A
0 < k < 4
B
k < 0
C
k > 4
D
k < 4
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