I am having a hard time trying to understand this transformation from lorentz:(adsbygoogle = window.adsbygoogle || []).push({});

https://imgur.com/a/WYWMO

(You should ignore the spanish part and just focus on the math). I can’t understand well why they turn into what you can see in the second picture, when taking really small values of x.

Also, I tried to aproximate to the fourth equation, but I get minus partial derivative of tau respect of x prime, instead of plus.

I would appreciate your help, thanks. I hope this is understandable, it is my first post, and I have no knoweldge of latex.

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# I Help with special relativity mathematics

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