Tính nhanh: \(\frac{2}{151}+\frac{2}{152}+\frac{2}{153}+...+\frac{2}{300}\)
Tính: \(\frac{2}{151}+\frac{2}{152}+\frac{2}{153}+....+\frac{2}{300}\)
Tính giúp tơ với
\(\frac{2}{151}+\frac{2}{152}+\frac{2}{153}+...+\frac{2}{300}\)
Tính \(\frac{2}{151}+\frac{2}{152}+\frac{2}{153}+...+\frac{2}{300}\)
Tìm x:
(\(\frac{3}{1.2}+\frac{3}{3.4}+\frac{3}{5.6}+...+\frac{3}{299.300}\)) X ( \(x+\frac{2}{3}\)) = \(\frac{2}{151}+\frac{2}{152}+\frac{2}{153}+...+\frac{2}{300}\)
Tìm x (\(\frac{3}{1.2}+\frac{3}{3.4}+\frac{3}{5.6}+...+\frac{3}{299.300}\)) x (\(x+\frac{2}{3}\)) = \(\frac{2}{151}+\frac{2}{152}+...+\frac{2}{300}\)
So sánh:
a) \(\frac{-152}{151}\) và \(\frac{-153}{152}\) b) \(\frac{3213}{3214}\)và \(\frac{9875}{9876}\)
Tính nhanh:
\(C=\frac{1}{2}+\frac{1}{14}+\frac{1}{35}+\frac{1}{65}+\frac{1}{104}+\frac{1}{152}\)
Tính nhanh :
D = \(\frac{1}{2}+\frac{1}{14}+\frac{1}{35}+\frac{1}{65}+\frac{1}{104}+\frac{1}{152}\)