___
/ x
- / -
\/ a
---------------
_______
/ x
2*x* / 1 - -
\/ a
$$- \frac{\sqrt{\frac{x}{a}}}{2 x \sqrt{1 - \frac{x}{a}}}$$
___
/ x /1 1 \
/ - *|- - ---------|
\/ a |x / x\|
| a*|1 - -||
\ \ a//
-----------------------
_______
/ x
4*x* / 1 - -
\/ a
$$\frac{\sqrt{\frac{x}{a}} \left(\frac{1}{x} - \frac{1}{a \left(1 - \frac{x}{a}\right)}\right)}{4 x \sqrt{1 - \frac{x}{a}}}$$
___
/ x / 3 3 2 \
/ - *|- -- - ----------- + -----------|
\/ a | 2 2 / x\|
| x 2 / x\ a*x*|1 - -||
| a *|1 - -| \ a/|
\ \ a/ /
------------------------------------------
_______
/ x
8*x* / 1 - -
\/ a
$$\frac{\sqrt{\frac{x}{a}} \left(- \frac{3}{x^{2}} + \frac{2}{a x \left(1 - \frac{x}{a}\right)} - \frac{3}{a^{2} \left(1 - \frac{x}{a}\right)^{2}}\right)}{8 x \sqrt{1 - \frac{x}{a}}}$$