\(K=-\frac{7}{9}+\frac{11}{24}+-\frac{5}{14}+\frac{2}{-9}+\frac{13}{24}\)
\(K=\left(-\frac{7}{9}+-\frac{2}{9}\right)+\left(\frac{11}{24}+\frac{13}{24}\right)+-\frac{5}{14}\)
\(K=-1+1+-\frac{5}{14}\)
\(K=0+-\frac{5}{14}=-\frac{5}{14}\)
Ủng hộ tk Đúng nhé ! ^^