Question

5- \(\dfrac{1+\dfrac{1}{3}}{1-\dfrac{1}{3}}\)

tính giá trị biểu thức

Answer 1

`5- ( 1+1/3)/(1-1/3)`

`= 5- (3/3 + 1/3)/(3/3-1/3)`

`= 5- (4/3)/(2/3)`

`= 5- 4/3 : 2/3`

`= 5- 4/3 xx 3/2`

`= 5- 12/6`

`= 5- 2`

`=3`

Answer 2

\(=5-\dfrac{\dfrac{3+1}{3}}{\dfrac{3-1}{3}}\\ =5-\dfrac{\dfrac{4}{3}}{\dfrac{2}{3}}\\ =5-\dfrac{4}{3}:\dfrac{2}{3}\\ =5-\dfrac{4}{3}.\dfrac{3}{2}\\ =5-\dfrac{4}{2}\\ =5-2=3\)