Tính tích phân \[\smallint \frac{{dx}}{{\sqrt {2 - 7{x^2}} }}\]

\[\frac{1}{{\sqrt 7 }}\arcsin (\sqrt {\frac{7}{2}} x) + C\]

\[\arcsin (\sqrt {\frac{7}{2}} x) + C\]

\[\frac{1}{{\sqrt 3 }}\arcsin (\sqrt {\frac{2}{3}} x) + C\]

\[\arcsin (\sqrt {\frac{2}{3}} x) + C\]