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Question

$x = r\left( {{H \over {H + h}}} \right)$

$x = r{\left( {{H \over {H + h}}} \right)^{{1 \over 2}}}$

$x = r{\left( {{H \over {H + h}}} \right)^{{1 \over 4}}}$

$x = r{\left( {{H \over {H + h}}} \right)^{{2}}}$

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