Question

Quy tắc tính đạo hàm nào sau đây là đúng?

A. \((u + v)' = u' - v'\).                                        

B. \((uv)' = u'v + uv'\).

C. \({\left( {\frac{1}{v}} \right)^,} =  - \frac{1}{{{v^2}}}\).                                                  

D. \({\left( {\frac{u}{v}} \right)^,} = \frac{{u'v + uv'}}{{{v^2}}}\).

Answer 1

\(A.\left(u+v\right)'=u'+v'\Rightarrow Sai\\ B.\left(uv\right)'=u'v+uv'\RightarrowĐúng\\ C.\left(\dfrac{1}{v}\right)'=-\dfrac{v'}{v^2}\Rightarrow Sai\\ D.\left(\dfrac{u}{v}\right)'=\dfrac{u'v-uv'}{v^2}\Rightarrow Sai\)

\(\Rightarrow\) Chọn B