[OS X TeX] AMS-LaTeX question

[Gary Gray]

Hi All,

In the attached PDF file, I have added an \underbrace command in the second line to call out the argument of the square root in the first line. I would like the square root in the second line to be the same size as that in the first, but LaTeX automatically sizes it to include the underbrace. Is there a way to force the square root in the second line to be the same size as that in the first? Here is the relevant source:

\begin{align*}
&= \frac{A} { \left( k - m \omega_{0}^{2} \right)^{2} + c^{2} \omega_{0}^{2} } \sqrt{ \left[ \left( k - m \omega_{0}^{2} \right) \left( m \omega_{0}^{2} + k - m \omega_{0}^{2} \right) + c^{2} \omega_{0}^{2} \right]^{2} + \left( m c \omega_{0}^{3} \right)^{2} }
\\
&= \frac{A} { \left( k - m \omega_{0}^{2} \right)^{2} + c^{2} \omega_{0}^{2} } \sqrt{ \underbrace{ \left[ k \left( k - m \omega_{0}^{2} \right) + c^{2} \omega_{0}^{2} \right]^{2} + \left( m c \omega_{0}^{3} \right)^{2} }_{Q} }.
\end{align*}

Thank you.

Gary

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