Question

[Tu Pham Van]

so sanh :A =(101¹⁰²+1)/(101¹⁰³+1) voi B = (101¹⁰³ +1 )/ (101¹⁰⁴+1)

ai lam duoc 3 tich

Answer 1

[Thắng Nguyễn]

\(101A=\frac{101\left(101^{102}+1\right)}{101^{103}+1}=\frac{101^{103}+101}{101^{103}+1}=\frac{101^{103}+1+100}{101^{103}+1}=\frac{101^{103}+1}{101^{103}+1}+\frac{100}{101^{103}+1}=1+\frac{100}{100^{103}+1}\)

\(101B=\frac{101\left(101^{103}+1\right)}{101^{104}+1}=\frac{101^{104}+101}{101^{104}+1}=\frac{101^{104}+1+100}{101^{104}+1}=\frac{101^{104}+1}{101^{104}+1}+\frac{100}{101^{104}+1}=1+\frac{100}{101^{104}+1}\)

vì 100¹⁰³+1<100¹⁰⁴+1

=>\(\frac{100}{100^{103}+1}>\frac{100}{100^{104}+1}\)

=>\(1+\frac{100}{100^{103}+1}>1+\frac{100}{100^{104}+1}\)

=>A>B