$C_{1}$:
A = ($3_{}$ + $\cfrac{1}{2}$ - $\cfrac{2}{3}$) - ($2_{}$ - $\cfrac{2}{3}$ + $\cfrac{5}{2}$) - ($5_{}$ - $\cfrac{5}{2}$ + $\cfrac{4}{3}$)
= $3_{}$ + $\cfrac{1}{2}$ - $\cfrac{2}{3}$ - $2_{}$ + $\cfrac{2}{3}$ - $\cfrac{5}{2}$ - $5_{}$ + $\cfrac{5}{2}$ - $\cfrac{4}{3}$
= ($3_{}$ - $2_{}$ - $5_{}$) + ($\cfrac{1}{2}$ - $\cfrac{5}{2}$ + $\cfrac{5}{2}$) + (- $\cfrac{2}{3}$ + $\cfrac{2}{3}$ - $\cfrac{4}{3}$)
= $-4_{}$ + $\cfrac{1}{2}$ - $\cfrac{4}{3}$
=$\cfrac{-29}{6}$
$C_{2}$:
A = ($3_{}$ + $\cfrac{1}{2}$ - $\cfrac{2}{3}$) - ($2_{}$ - $\cfrac{2}{3}$ + $\cfrac{5}{2}$) - ($5_{}$ - $\cfrac{5}{2}$ + $\cfrac{4}{3}$)
= $\cfrac{17}{6}$ - $\cfrac{23}{6}$ - $\cfrac{23}{6}$
= $\cfrac{-29}{6}$
Chúc bn học tốt!
Mong bn cho mik ctlhn và vote 5* ah
