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Mathematics
Problem
For
f
(
x
)
=
x
4
−
4
x
3
+
6
f(x)=x^{4}-4x^{3}+6
f
(
x
)
=
x
4
−
4
x
3
+
6
, determine the open intervals on which the graph of
f
f
f
is concave down.
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