4 lines
133 B
TeX
4 lines
133 B
TeX
\begin{align}
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r &= a(e\ch\xi-1), & t&=\sqrt{ma^3/\alpha}(e\sh\xi-\xi), \\
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x &= a(e-\ch\xi)), & t&=a\sqrt{e^2-1}\sh\xi,
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\end{align}
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