(i)
\(\frac{13}{5} \div\frac{26}{10}= \frac{26}{10}\div\frac{13}{5}\)
LHS = \(\frac{13}{5}\div\frac{26}{10}\)
= \(\frac{13}{5}\times\frac{10}{26}\)
= \(\frac{13\times10}{5\times26}\)
= \(\frac{130}{130}= 1\)
RHS = \(\frac{26}{10}\div\frac{13}{5}\)
= \(\frac{26}{10}\times\frac{5}{13}\)
= \(\frac{26\times5}{10\times13}
\)
= \(\frac{130}{130}=1\)
Since, RHS = LHS
Therefore, True
(ii)
\(-9\div\frac{3}{4}=\frac{3}{4}(-9)\)
LHS = \(-9\div\frac{4}{3}\)
= \(-9\times\frac{4}{3}\)
= \(\frac{-9\times4}{3}\)
= \(\frac{-36}{3}=-12\)
RHS = \(\frac{3}{4}\div(-9)\)
= \(\frac{3}{4}\times\frac{1}{-9}\)
= \(\frac{3\times1}{4\times-9}\)
= \(\frac{3}{-36}=\frac{-1}{12}\)
Since, RHS ≠ LHS
Therefore, False
(iii)
\(\frac{-8}{9}\div\frac{-4}{3}= \frac{-4}{3}\div\frac{-8}{9}\)
LHS = \(\frac{-8}{9}\div\frac{-4}{3}\)
= \(\frac{-8}{9}\times\frac{3}{-4}\)
= \(\frac{-8\times3}{9\times-4}\)
= \(\frac{-24}{-36} =\frac{2}{3}\)
RHS = \(\frac{-4}{3}\div\frac{-8}{9}\)
= \(\frac{-4}{9}\times\frac{9}{-8}\)
= \(\frac{-4\times9}{3\times-8}\)
= \(\frac{-36}{-24}=\frac{3}{2}\)
Since, RHS ≠ LHS
(iv)
\(\frac{-7}{24}\div\frac{3}{-16}=\frac{3}{-16}\div\frac{-7}{24}\)
LHS = \(\frac{-7}{24}\div\frac{3}{-16}\)
= \(\frac{-7}{24}\times\frac{-16}{3}\)
= \(\frac{-7\times-16}{24\times3}\)
= \(\frac{112}{72}=\frac{14}{9}\)
RHS = \(\frac{3}{-16}\div\frac{-7}{24}\)
= \(\frac{3}{-16}\times\frac{24}{-7}\)
= \(\frac{3\times24}{-16\times-7}\)
= \(\frac{72}{112}=\frac{9}{14}\)
Since, RHS ≠ LHS
Therefore, False