How can I show that(adsbygoogle = window.adsbygoogle || []).push({});

[tex]1+z=\sqrt{\frac{1+v/c}{1-v/c}}[/tex]

becomes [tex]z \simeq v/c[/tex] for small velocities? Please give me a hint.

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# How can I show that z = v/c for small velocities

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