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 = \(\frac{1}{2}+\frac{1}{14}+\frac{1}{35}+\frac{1}{65}+\frac{1}{104}+\frac{1}{152}\)