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Problem
Problem
If the expression
(
m
x
−
1
+
1
x
)
\left(mx - 1 + \frac{1}{x}\right)
(
m
x
−
1
+
x
1
)
is non-negative for all positive real
x
x
x
, the minimum value of
m
m
m
must be a.
−
1
2
-\frac{1}{2}
−
2
1
b. 0 c.
1
4
\frac{1}{4}
4
1
d.
1
2
\frac{1}{2}
2
1
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