Question

$\frac{d}{dx}(\frac{1}{x}\frac{d^2}{dx^2}(\frac{1}{x^3}))=$

• A. -36x-7
• B. 36x-7
• C. 72x-6
• D. 72x-7
• E. -72x-7

Answer 1

Answer: (E)

-72x-7

Answer 2

The correct option is (E) : -72x-7