Question

[Trần Thùy Linh]

Các bạn giúp mình với!

Answer 1

[Nguyễn Hoàng Minh]

\(=\dfrac{45}{19}-\left(\dfrac{1}{2}+\left(\dfrac{1}{3}+4\right)^{-1}\right)^{-1}\\ =\dfrac{45}{19}-\left(\dfrac{1}{2}+\left(\dfrac{13}{4}\right)^{-1}\right)^{-1}\\ =\dfrac{45}{19}-\left(\dfrac{1}{2}+\dfrac{4}{13}\right)^{-1}\\ =\dfrac{45}{19}-\left(\dfrac{21}{26}\right)^{-1}=\dfrac{45}{19}-\dfrac{26}{21}=\dfrac{451}{399}\)

Answer 2

[Trần Thùy Linh]

Cảm ơn bạn!