1 Answer

Tchami · Answer 1 · 2023-05-31T02:51:09+0000

To find the geometric mean,

Simply follow the steps below:

$\frac{x}{7\text{ }}=(12)/(x)$
x^2=84

Take the square root of both-side

$x=\sqrt[]{84}$
$=\sqrt[]{4\text{ x 21}}$

$=2\sqrt[]{21}$

Therefore, the correct option is C.2√21

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