Question

B = 45 * [ 7373/3030 + 7373/4242 + 7373/5656 + 7373/9090]

Answer 1

\(B=45.\left(\frac{7373}{3030}+\frac{7373}{4242}+\frac{7373}{5656}+\frac{7373}{9090}\right)\)

\(B=45.\left(\frac{73}{30}+\frac{73}{42}+\frac{73}{56}+\frac{73}{90}\right)\)

\(B=45.73.\left(\frac{1}{30}+\frac{1}{42}+\frac{1}{56}+\frac{1}{90}\right)\)

\(B=3285.\left(\frac{1}{5.6}+\frac{1}{6.7}+\frac{1}{7.8}+\frac{1}{9.10}\right)\)

\(B=3285.\left(\frac{1}{5}-\frac{1}{6}+\frac{1}{6}-\frac{1}{7}+\frac{1}{7}-\frac{1}{8}+\frac{1}{90}\right)\)

\(B=3285.\left(\frac{1}{5}-\frac{1}{8}+\frac{1}{90}\right)\)

\(B=3285.\frac{31}{360}=\frac{2263}{8}\)

Answer 2

bn xem lại đề đi nhé

Answer 3

mình thiếu

Answer 4

mình thiếu 7373/7272