n-th derivative of 1/(ax + b) or log x

1. A.
   $\frac{(n - 1)!}{x^{n}}$
2. B.
   $\frac{n!}{x^{n}}$
3. C.
   $\frac{(n - 2)!}{x^{n}}$
4. D.
   $\ ( - 1)^{n - 1}\frac{(n - 1)!}{x^{n}}$

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1. A.
   $\dfrac{9! \times 3^9}{(3x + 5)^9}$
2. B.
   $\dfrac{(-1)^8 \times 9! \times 3^9}{(3x + 5)^9}$
3. C.
   $\dfrac{(-1)^9 \times 9! \times 3^9}{(3x + 5)^{10}}$
4. D.
   $\dfrac{(-1)^8 \times 8! \times 3^9}{(3x + 5)^{10}}$

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1. A.
   $2$
2. B.
   $\dfrac{1}{2}$
3. C.
   $3$
4. D.
   $\dfrac{1}{3}$

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