Tính biểu thức sau:
\(\frac{1+2}{2}\)+ \(\frac{1+2+3}{3}\)+ \(\frac{1+2+3+4}{4}\)+ ....... + \(\frac{1+2+3+....+197+198+199}{199}\)
Cho dãy tính :
1 + \(\frac{1+2}{2}+\frac{1+2+3}{3}+.......+\frac{1+2+3...+199}{199}=?\)
\(1+\frac{1+2}{2}+\frac{1+2+3}{3}+.......+\frac{1+2+3+...+199}{199}=?\)= ....................
\(1+\frac{1+2}{2}+\frac{1+2+3}{3}+...+\frac{1+2+3+...+199}{199}\)
\(1+\frac{1+2}{2}+\frac{1+2+3}{3}+...........+\frac{1+2+3......+199}{199}\)
Tính: 1+\(\frac{1+2}{2}\)+\(\frac{1+2+3}{3}\)+....+\(\frac{1+2+3+....+199}{199}\)
Tính:
1+\(\frac{1+2}{2}\)+ \(\frac{1+2+3}{3}\)+.........+\(\frac{1+2+3+.......+199}{199}\)
\(S=\frac{\frac{1}{2}+\frac{1}{3}+...+\frac{1}{200}}{\frac{1}{1999}+\frac{2}{1998}+...+\frac{198}{2}+\frac{199}{1}}\) giải giúp mình với nhé
Tính nhanh:\(\frac{\frac{1}{2}}{1+2}+\frac{\frac{1}{2}}{1+2+3}+\frac{\frac{1}{2}}{1+2+3+4}+...+\frac{\frac{1}{2}}{1+2+3+4+...+100}\)
