Question

Gỡ rối (4^-1 - 3^-1)^-1

 A.-12    B.-1    C.\(\dfrac{1}{12}\)    D.1   E.12

Answer 1

D

Answer 2

\(\left(4^{-1}-3^{-1}\right)^{-1}=\left(\dfrac{1}{4}-\dfrac{1}{3}\right)^{-1}=\left(\dfrac{-1}{12}\right)^{-1}=\dfrac{1}{\dfrac{-1}{12}}=-12\)

Chọn A

Answer 3

\(\left(\dfrac{1}{4}-\dfrac{1}{3}\right)^{-1}=\left(\dfrac{-1}{12}\right)^{-1}=-12\) 

=> A nhé

 

Answer 4

A

Answer 5

A

Answer 6

A nha