If $f (x) = 3 x^{- 2}$ , calculate the value of $f (2)$ .

\frac{1}{36}

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\frac{1}{4}

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\frac{3}{4}

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12

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36

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Solution

The correct option is C $\frac{3}{4}$
Given, $(x) = 3 x^{- 2}$
$\Rightarrow f (x) = \frac{3}{x^{2}}$
Then $(2) = \frac{3}{(2)^{2}} = \frac{3}{4}$

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