Question

So sánh

10 mũ 20 + 1 phần 10 mũ 22 + 1  và 10 mũ 22 + 10 mũ 24 

mk cần nhanh nha mọi người

Answer 1

\(\frac{10^{20}+1}{10^{22}+1}=\frac{10^{20}+\frac{1}{100}+\frac{99}{100}}{10^{22}+1}=\frac{1}{100}+\frac{99}{100\left(10^{22}+1\right)}\)

\(\frac{10^{22}+1}{10^{24}+1}=\frac{10^{22}+\frac{1}{100}+\frac{99}{100}}{10^{24}+1}=\frac{1}{100}+\frac{99}{100\left(10^{24}+1\right)}\)

Có \(10^{22}+1< 10^{24}+1\Rightarrow\frac{99}{100\left(10^{22}+1\right)}>\frac{99}{100\left(10^{24}+1\right)}\)

do đó \(\frac{10^{20}+1}{10^{22}+1}>\frac{10^{22}+1}{10^{24}+1}\).