PK &TP1$ $ 197dv46cu9o.texUT ^fux $f'(x) = \frac{x}{\sqrt{x^2 +1}}-1$ PK PP^^ t 1irqbf0jlsk.htmlUT ^fux I,ШTUHQjyI 綜yns7zn{7~nϹ v}Fd )@JW 4VK/6@Ra PK ]NP@t ! 1qpn61trbjs.htmlUT ^fux I,X PK 'PPd78 2g21m59u4vc.htmlUT j^fux