A=(1+1+...+1)−(91​+102​+...+10092​)𝓒𝓸́ 92 𝓼𝓸̂́ 1

\(� = \left(\right. 1 - \frac{1}{9} \left.\right) + \left(\right. 1 - \frac{2}{10} \left.\right) + . . . + \left(\right. 1 - \frac{92}{100} \left.\right)\)

\(� = \frac{8}{9} + \frac{8}{10} + . . . + \frac{8}{100}\)

\(� = 8. \left(\right. \frac{1}{9} + \frac{1}{10} + . . . + \frac{1}{100} \left.\right)\)

\(� = \frac{1}{45} + \frac{1}{50} + . . . + \frac{1}{500}\)

\(� = \frac{1}{5} . \left(\right. \frac{1}{9} + \frac{1}{10} + . . . + \frac{1}{100} \left.\right)\)

\(\Rightarrow \frac{�}{�} = \frac{8. \left(\right. \frac{1}{9} + \frac{1}{10} + . . . + \frac{1}{100} \left.\right)}{\frac{1}{5} . \left(\right. \frac{1}{9} + \frac{1}{10} + . . . + \frac{1}{100} \left.\right)} \Rightarrow \frac{�}{�} = \frac{8}{\frac{1}{5}} = 40\)

𝓥𝓪̣̂𝔂 𝓽𝓲̉ 𝓼𝓸̂́ 𝓬𝓾̉𝓪 𝓐 𝓿𝓪̀ 𝓑 𝓵𝓪̀ 40