Question

c) ( 4/7+4/9-4/11)/(5/7+5/9-5/11)

Tính . Thanks

Answer 1

\(\frac{\left(\frac{4}{7}+\frac{4}{9}-\frac{4}{11}\right)}{\left(\frac{5}{7}+\frac{5}{9}-\frac{5}{11}\right)}=\frac{\left(\frac{64}{63}-\frac{4}{11}\right)}{\left(\frac{80}{63}-\frac{5}{11}\right)}=\frac{\frac{452}{693}}{\frac{565}{693}}=\frac{452}{565}=\frac{4}{5}\)

Answer 2

c) (4/7+4/9-4/11) / (5/7+5/9-5/11)

=(452/693 ) / (565/693)

= 452/565

=4/5

Answer 3

\(\left(\frac{4}{7}+\frac{4}{9}-\frac{4}{11}\right):\left(\frac{5}{7}+\frac{5}{9}-\frac{5}{11}\right)\)

\(=\left(\frac{64}{63}-\frac{4}{11}\right):\left(\frac{80}{63}-\frac{5}{11}\right)\)

\(=\frac{7}{11}:\frac{565}{693}\)

\(=\frac{441}{565}\)

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