3
-------------
__________
/ 2
\/ 1 - 9*x
$$\frac{3}{\sqrt{1 - 9 x^{2}}}$$
27*x
-------------
3/2
/ 2\
\1 - 9*x /
$$\frac{27 x}{\left(1 - 9 x^{2}\right)^{\frac{3}{2}}}$$
/ 2 \
| 27*x |
27*|1 + --------|
| 2|
\ 1 - 9*x /
-----------------
3/2
/ 2\
\1 - 9*x /
$$\frac{27 \cdot \left(\frac{27 x^{2}}{1 - 9 x^{2}} + 1\right)}{\left(1 - 9 x^{2}\right)^{\frac{3}{2}}}$$