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Mathematics
Problem
Find the minimum value of
f
(
x
)
=
x
+
9
x
f(x)=x+\dfrac{9}{x}
f
(
x
)
=
x
+
x
9
for
x
>
0
x>0
x
>
0
. a)
9
9
9
b)
6
6
6
c)
8
8
8
d)
7
7
7
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