Đặt \(u\left( x \right) = u,\,\,v\left( x \right)...

Câu hỏi: Đặt \(u\left( x \right) = u,\,\,v\left( x \right) = v\). Chọn khẳng định đúng?

A \(\left( {\dfrac{u}{v}} \right)' = \dfrac{{u'v - v'u}}{v}\)

B \(\left( {\dfrac{u}{v}} \right)' = \dfrac{{u'v - v'u}}{{{v^2}}}\)

C \(\left( {\dfrac{u}{v}} \right)' = \dfrac{{u'v + v'u}}{v}\)

D \(\left( {\dfrac{u}{v}} \right)' = \dfrac{{u'v + v'u}}{{{v^2}}}\)