Tính đạo hàm cấp \(n\) của hàm số \(y = \frac{x}{{{x^2} + 5x + 6}}\)

\[{y^{(n)}} = \frac{{{{( - 1)}^n}.3.n!}}{{{{(x + 3)}^{n + 1}}}} + \frac{{{{( - 1)}^n}.2.n!}}{{{{(x + 2)}^{n + 1}}}}\]

\[{y^{(n)}} = \frac{{{{( - 1)}^n}.3.n!}}{{{{(x + 3)}^n}}} - \frac{{{{( - 1)}^n}.2.n!}}{{{{(x + 2)}^n}}}\]

\[{y^{(n)}} = \frac{{{{( - 1)}^n}.3.n!}}{{{{(x + 3)}^{n - 1}}}} - \frac{{{{( - 1)}^n}.2.n!}}{{{{(x + 2)}^{n - 1}}}}\]

\[{y^{(n)}} = \frac{{{{( - 1)}^n}.3.n!}}{{{{(x + 3)}^{n + 1}}}} - \frac{{{{( - 1)}^n}.2.n!}}{{{{(x + 2)}^{n + 1}}}}\]