If the expression is non-negative for all positive real

MATHEMATICS · Single correct · A Level · Mathematics · Algebra and Functions · Algebra and Functions

Problem

If the expression

mx-1+\frac{1}{x}

is non-negative for all positive real

x

, the minimum value of

m

is (1)

-\frac{1}{2}

(2)

0

(3)

\frac{1}{4}

(4)

\frac{1}{2}