Question
If the function $f(x)=x^{2}+a / x$ has a local minimum at $x=2$, then the value of $a$ is(a) 8(b) 16(c) 18(d) 12
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The derivative of $f(x)$ is given by $f'(x) = 2x - \frac{a}{x^2}$. Show more…
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The function $f(x)=\frac{x}{2}+\frac{2}{x}$ has a local minimum at (A) $x=2$ (B) $x=-2$ (C) $x=0$ (D) $x=1$
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