Chứng minh rằng:
a) \(\frac{1}{2!}+\frac{1}{3!}+\frac{1}{4!}+...+\frac{1}{100!}<1\)
b) \(\frac{9}{10!}+\frac{9}{11!}+\frac{9}{12!}+...+\frac{9}{1000!}<\frac{1}{9!}\)
a)Cho S = \(\frac{1}{1!}+\frac{1}{2!}+\frac{1}{3!}+...+\frac{1}{2012!}.\) Chứng minh rằng S< 2
b)Chứng minh rằng :\(\frac{9}{10!}+\frac{10}{11!}+\frac{11}{12!}+\frac{99}{100!}< \frac{1}{9!}\)
Ai làm nhanh mk l*** cho nhé !
1,Chứng minh rằng
\(\frac{9}{10!}+\frac{9}{11!}+\frac{9}{12!}+...+\frac{9}{1000!}< \frac{1}{9!}\)
Chứng minh:
\(B=\frac{9}{10!}+\frac{9}{11!}+\frac{9}{12!}+....+\frac{9}{100!}
Chứng minh rằng:
a) \(\frac{1}{2!}+\frac{1}{3!}+\frac{1}{4!}+...+\frac{1}{100!}<1\)
b) \(\frac{9}{10!}+\frac{9}{11!}+\frac{9}{12!}+...+\frac{9}{1000!}<\frac{1}{9!}\)
Chứng minh rằng :
\(\frac{9}{10!}+\frac{9}{11!}+\frac{9}{12!}+........+\frac{9}{1000!}<\frac{1}{9!}\)
Chứng minh:\(\frac{1}{10}+\frac{1}{11}+\frac{1}{12}+...+\frac{1}{99}+\frac{1}{100}>1\)
Chứng minh rằng
\(\frac{9}{10!}+\frac{9}{11!}+\frac{9}{12!}+...+\frac{9}{1000!}<\frac{1}{9!}\)
Làm nhanh lên nhé
Chứng minh rằng :
B=\(9\left(\frac{1}{10!}+\frac{1}{11!}+\frac{1}{12!}+...+\frac{1}{2020!}\right)< \frac{1}{9!}\)