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Mathematics
Mathematics
Problem
For the function
h
(
x
)
=
e
x
x
h(x)=\dfrac{e^{x}}{x}
h
(
x
)
=
x
e
x
defined for
x
>
0
x>0
x
>
0
, which of the following
x
x
x
-values corresponds to a point where the tangent line is horizontal and the graph is concave up? a)
1
2
\dfrac12
2
1
b)
2
\sqrt{2}
2
c)
1
1
1
d)
2
2
2
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