Câu hỏi của quachgiakhai

Question

m=3/2-5/6+7/12-9/20+11/30-13/42+15/56-17/72

Dương · Accepted Answer

$m=\frac{3}{2}-\frac{5}{6}+\frac{7}{12}-\frac{9}{20}+\frac{11}{30}-\frac{13}{42}+\frac{15}{56}-\frac{17}{72}$$m=\frac{2}{3}+\frac{7}{12}-\frac{9}{20}+\frac{11}{30}-\frac{13}{42}+\frac{15}{56}-\frac{17}{72}$$m=\frac{5}{4}-\frac{9}{20}+\frac{11}{30}-\frac{13}{42}+\frac{15}{56}-\frac{17}{72}$$m=\frac{4}{5}+\frac{11}{30}-\frac{13}{42}+\frac{15}{56}-\frac{17}{72}$$m=\frac{7}{6}-\frac{13}{42}+\frac{15}{56}-\frac{17}{72}$$m=\frac{6}{7}+\frac{15}{56}-\frac{17}{72}$$m=\frac{9}{8}-\frac{17}{72}$$m=\frac{8}{9}$Câu trả lời: $m=\frac{3}{2}-\frac{5}{6}+\frac{7}{12}-\frac{9}{20}+\frac{11}{30}-\frac{13}{42}+\frac{15}{56}-\frac{17}{72}$$m=\frac{2}{3}+\frac{7}{12}-\frac{9}{20}+\frac{11}{30}-\frac{13}{42}+\frac{15}{56}-\frac{17}{72}$$m=\frac{5}{4}-\frac{9}{20}+\frac{11}{30}-\frac{13}{42}+\frac{15}{56}-\frac{17}{72}$$m=\frac{4}{5}+\frac{11}{30}-\frac{13}{42}+\frac{15}{56}-\frac{17}{72}$$m=\frac{7}{6}-\frac{13}{42}+\frac{15}{56}-\frac{17}{72}$$m=\frac{6}{7}+\frac{15}{56}-\frac{17}{72}$$m=\frac{9}{8}-\frac{17}{72}$$m=\frac{8}{9}$

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