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Mathematics
Mathematics
Problem
Let
f
(
x
)
=
a
x
+
x
2
f(x) = \frac{a}{x} + x^2
f
(
x
)
=
x
a
+
x
2
. If it has a maximum at
x
=
−
3
x = -3
x
=
−
3
then
a
a
a
is : (A)
−
1
-1
−
1
(B)
16
16
16
(C)
1
1
1
(D) None of these
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