\(A=\frac{1}{2}+\frac{1}{6}+\frac{1}{12}+...+\frac{1}{110}\)
\(A=\frac{1}{1.2}+\frac{1}{2.3}+\frac{1}{3.4}+...+\frac{1}{10.11}\)
\(A=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+...+\frac{1}{10}-\frac{1}{11}\)
\(A=1-\frac{1}{11}\)
\(A=\frac{10}{11}\)
\(\frac{1}{5}< y< 1\)
ai nhanh tay tick 5 lai nhe !
\(\frac{a;a+5}{25}=\frac{1}{5}\)
ai nhanh tay minh tich 5 lai cho nhe !
x ; 5 + \(\frac{1}{2}\)X 3 = \(4\frac{1}{3}\)
AI NHANH TAY TIICK 10 LAI NHE !
\(\frac{M+1}{M+5}\frac{M+11}{M+15}SOSANH\)
Ai nhanh tay minh tick cho nhe !
\(\frac{18}{19}va\frac{19}{18}\)so sánh trung gian nhé !
ai nhanh tay tick 5 lai nhe !
\(\frac{20}{21}va\frac{2000}{2001}\)so sánh phần bù nhé !
ai nhanh tay tick 5 lai nhe !
\(\frac{37}{38}va\frac{38}{37}\)bài này so sánh trung gian nhe !
ai nhanh tay to tick 5 lai
tong 2 so bang 1800. tim 2 so biet \(\frac{1}{2}\)số thứ nhất bằng \(\frac{2}{5}\)số thứ hai
ai nhanh tay min tick 5 lai
Tính nhanh :
\(\frac{1}{2}+\frac{1}{6}+\frac{1}{12}+\frac{1}{20}+\frac{1}{30}+\frac{1}{42}+\frac{1}{56}+\frac{1}{72}+\frac{1}{90}+\frac{1}{110}=\)