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Tính A = \(\frac{\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{49}+\frac{1}{50}}{\frac{1}{49}+\frac{2}{48}+\frac{3}{47}+...+\frac{48}{2}+\frac{49}{1}}\)
Cho S = \(\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{48}+\frac{1}{49}+\frac{1}{50}\)và P = \(\frac{1}{49}+\frac{2}{48}+\frac{3}{47}+...+\frac{48}{2}+\frac{49}{1}\). Tính \(\frac{S}{P}\)
tính giá trị biểu thức A=\(\orbr{\begin{cases}\frac{1}{1}+\frac{1}{2}+\frac{1}{3}+...+\frac{1}{40}+\frac{1}{50}\\\frac{100}{1}+\frac{49}{2}+\frac{48}{3}+...+\frac{2}{49}+\frac{1}{50}\end{cases}}\)
ai có tâm giúp mình, với mình hứa cho 2 tick[no joke]
Cho P=\(\frac{1}{2}+\frac{1}{3}+......+\frac{1}{48}+\frac{1}{49}\)+ \(\frac{1}{50}\) ;Q= \(\frac{1}{49}+\frac{2}{48}+.....+\frac{48}{2}+\frac{49}{1}\)
Tính \(\frac{P}{Q}\)
Cho 50.A=\(\frac{49}{1}+\frac{48}{2}+\frac{47}{3}+...+\frac{2}{48}+\frac{1}{49}\)
Cho S=\(\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+.........+\frac{1}{48}+\frac{1}{49}+\frac{1}{50}\) VÀ
P=\(\frac{1}{49}+\frac{2}{48}+\frac{3}{47}+......+\frac{48}{2}+\frac{49}{1}\)
Tính \(\frac{S}{P}\)
Chứng minh rằng:\(\frac{1}{26}+\frac{1}{27}+\frac{1}{28}+....+\frac{1}{49}+\frac{1}{50}=\frac{91}{50}-\frac{97}{49}+\frac{95}{48}-\frac{93}{47}+.....+\frac{7}{4}-\frac{5}{3}+\frac{3}{2}=1\)
CHO: \(S=\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{49}+\frac{1}{50}\)
\(P=\frac{1}{49}+\frac{2}{48}+\frac{3}{47}+...+\frac{48}{2}+\frac{49}{1}\)
Tính \(\frac{S}{P}\)
Cho S = \(\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{50}\) và \(\frac{1}{49}+\frac{2}{48}+\frac{3}{47}+...+\frac{49}{1}\) . Tính \(\frac{s}{p}\)