a,\(\sqrt{17}+\sqrt{26}+1>\sqrt{16}+\sqrt{25}+1=10=\sqrt{100}>\sqrt{99}\)
b,Ta có:\(\hept{\begin{cases}\frac{1}{\sqrt{1}}>\frac{1}{\sqrt{100}}\\\frac{1}{\sqrt{2}}>\frac{1}{\sqrt{100}}\\.........\end{cases}}\)\(\Rightarrow\frac{1}{\sqrt{1}}+\frac{1}{\sqrt{2}}+........+\frac{1}{\sqrt{100}}>\frac{1}{\sqrt{100}}+\frac{1}{\sqrt{100}}+......+\frac{1}{\sqrt{100}}=\frac{100}{\sqrt{100}}=10\)
\(\sqrt{17}+\sqrt{26}+1và\sqrt{99}\)
b)chứng minh:\(\frac{1}{\sqrt{ }1}+\frac{1}{\sqrt{ }2}+\frac{1}{\sqrt{ }3}+...+\frac{1}{\sqrt{ }99}+\frac{1}{\sqrt{ }100}>10\)
c)cho:S=\(1-\frac{1}{2}+\frac{1}{3}-\frac{1}{4}+...+\frac{1}{2013}-\frac{1}{2014}+\frac{1}{2015}\)vàP=\(\frac{1}{1008}+\frac{1}{1009}+\frac{1}{1010}+...+\frac{1}{2014}+\frac{1}{2015}\)tính \(\left(S-P\right)^{2016}\)
a) so sánh
\(\sqrt{17}+\sqrt{26}+1\) và \(\sqrt{99}\)
b) CMR
\(\frac{1}{\sqrt{1}}+\frac{1}{\sqrt{2}}+\frac{1}{\sqrt{3}}+...+\frac{1}{\sqrt{100}}>10\)
a) So sanh: \(\sqrt{17}+\sqrt{26}+1\)va \(\sqrt{99}\)
b) CMR: \(\frac{1}{\sqrt{1}}+\frac{1}{\sqrt{2}}+\frac{1}{\sqrt{3}}+...+\frac{1}{\sqrt{100}}>10\)
a) So sánh \(\sqrt{17}+\sqrt{26}+1\)và \(\sqrt{99}\)
b) Chứng minh rằng: \(\frac{1}{\sqrt{1}}+\frac{1}{\sqrt{2}}+\frac{1}{\sqrt{3}}+...+\frac{1}{\sqrt{100}}>10\)
a, so sánh: \(\sqrt{17}+\sqrt{26}+1\)và \(\sqrt{99}\)
b, CMR: \(\frac{1}{\sqrt{1}}+\frac{1}{\sqrt{2}}+...+\frac{1}{\sqrt{100}}\)>10
a) So sánh: \(\sqrt{17}\)+ \(\sqrt{26}\)+1 và \(\sqrt{99}\)
b) CMR: \(\frac{1}{\sqrt{1}}\)+\(\frac{1}{\sqrt{2}}\)+\(\frac{1}{\sqrt{3}}\)+....+\(\frac{1}{\sqrt{100}}\)>10
Tính \(A=\frac{1}{2.\sqrt{1}+1.\sqrt{2}}+\frac{1}{3\sqrt{2}+2\sqrt{3}}+\frac{1}{4\sqrt{3}+3\sqrt{4}}+....+\frac{1}{100.\sqrt{99}+99.\sqrt{100}}\)
CM :\(\frac{1}{\sqrt{1}}+\frac{1}{\sqrt{2}}+\frac{1}{\sqrt{3}}\)+\(....+\frac{1}{\sqrt{99}}+\frac{1}{\sqrt{100}}>10\)
Chung minh rang A=\(1+\frac{1}{\sqrt{2}}+\frac{1}{\sqrt{3}}+\frac{1}{\sqrt{4}}+...+\frac{1}{\sqrt{99}}+\frac{1}{\sqrt{100}}>10\)>10
