Question

Thực hiện phép tính

Answer 1

\(\left[\left(\dfrac{5}{2}\right)^2-2\left(\dfrac{-1}{3}\right)^2+2\right]-\left(\dfrac{-1}{3}\right)^3=\left[\dfrac{25}{4}-\dfrac{2}{9}+2\right]+\dfrac{1}{27}=\dfrac{289}{36}+\dfrac{1}{27}=\dfrac{871}{108}\)

Answer 2

`@` `\text {Ans}`

`\downarrow`

`c)`

`[ (5/2)^2 - 2*(-1/3)^2 + 2] - (-1/3)^3`

`= (25/4 - 2*1/9 + 2) - (-1/27)`

`= (25/4 - 2/9 + 2) + 1/27`

`= 217/36 + 2 + 1/27`

`= 289/36 + 1/27`

`= 871/108`

Answer 3

[(5/2)² - 2.(-1/3)² + 2] - (-1/3)³

= 25/4 - 2.1/9 + 2 + 1/27

= (25/4 + 2) - (2/9 - 1/27)

= 33/4 - 5/27

= 871/108