Question

giúp milk câu c và d là đc

Answer 1

c: \(C=-66\cdot\left(\dfrac{33}{66}-\dfrac{22}{66}+\dfrac{6}{66}\right)+124\cdot\left(-100\right)\)

\(=-16-12400=-12416\)

d: \(=\dfrac{7}{4}\left(\dfrac{33}{12}+\dfrac{33}{20}+\dfrac{33}{30}+\dfrac{33}{42}\right)\)

\(=\dfrac{7}{4}\cdot33\cdot\left(\dfrac{1}{3}-\dfrac{1}{4}+\dfrac{1}{4}-\dfrac{1}{5}+\dfrac{1}{5}-\dfrac{1}{6}+\dfrac{1}{6}-\dfrac{1}{7}\right)\)

\(=\dfrac{7}{4}\cdot33\cdot\dfrac{4}{21}=\dfrac{33}{3}=11\)