Question

[Đỗ Khánh Linh]

so sánh

\(\frac{100^{2015^{ }}+1}{100^{2005}+1}\) và\(\frac{100^{2016}+1}{100^{2006}+1}\)

Answer 1

[Ninh Thế Quang Nhật]

\(\frac{100^{2015}+1}{100^{2015}+1}=1\)

\(\frac{100^{2016}+1}{100^{2016}+1}=1\)

Vì 1 = 1 nên \(\frac{100^{2015}+1}{100^{2015}+1}=\frac{100^{2016}+1}{100^{2016}+1}\)

Answer 2

[Ninh Thế Quang Nhật]

à mình nhìn nhầm đề 

Mình giải nha

Đặt \(A=\frac{100^{2015}+1}{100^{2005}+1}\Rightarrow\frac{A}{100^{10}}=\frac{100^{2015}+1}{100^{2015}+100^{10}}=\frac{100^{2015}+100^{10}-999}{100^{2015}+100^{10}}=1-\frac{999}{100^{2015}+100^{10}}\)

Đặt \(B=\frac{100^{2016}+1}{100^{2006}+1}\Rightarrow\frac{B}{100^{10}}=\frac{100^{2016}+100^{10}-999}{100^{2016}+100^{10}}=1-\frac{999}{100^{2016}+100^{10}}\)

\(1-\frac{999}{100^{2015}+100^{10}}< 1-\frac{999}{100^{2016}+100^{10}}\Rightarrow A< B\)